UMEHARA MASAAKI 梅原雅顕

… Alternative Names

Researcher Number	90193945
Other IDs
External Links
Affiliation (Current)	2022: 東京工業大学, 情報理工学院, 教授
Affiliation (based on the past Project Information) *help	2016 – 2021: 東京工業大学, 情報理工学院, 教授 2017: 東京工業大学, 大学院情報理工学研究科, 教授 2017: 東京工業大学, 理工学研究科, 教授 2015: 東工大, 大学院情報理工学研究科, 教授 2012 – 2015: 東京工業大学, 情報理工学(系)研究科, 教授 … More
Review Section/Research Field	Principal Investigator Geometry / Geometry / Basic Section 11020:Geometry-related Except Principal Investigator Geometry / Geometry / 代数学・幾何学 / 解析学
Keywords	Principal Investigator 双曲型空間 / 平均曲率 / ガウス曲率 / 波面 / 特異点 / 曲面 / ガウス写像 / 曲線 / 極小曲面 / 極大曲面 … More Except Principal Investigator 特異点 / 微分幾何 / 幾何学 / 等径超曲面 / 平均曲率一定曲面 / 平均曲率 / ラグランジュ特異点 / ルジャンドル特異点 / 双曲空間 / ワイエルストラス表現 / フロント / 極大曲面 / 部分多様体 / 安定性 / 極小曲面 / ガウス写像 / 調和写像 / 複素多様体 / シュレディンガー方程式 / ケーラー多様体 / 特異点論 / 相対性理論 / ミンコフスキー空間 / 特異点の微分幾何 / 可積分系 / 離散化 / Ricci soliton / アインシュタイン計量 / 曲面 / カスプ辺 / 非線形現象 / 世界面 / ミンコフスキー時空 / 平坦トーラス / ３次元球面 / 正則閉曲線 / ２重接触 / 微分幾何学 / 直径 / 剛性 / stability / 退化 / cuspidal edge / cuspidal cross cap / swallowtail / 全曲率 / ワイエルストラス表現公式 / extremal metric / balanced metric / test configuration / obstruction / ローレンツ多様体 / 零平均曲率曲面 / Minkowski空間 / Bevnstein問題 / 調和Weylテンソル / 単純Lie群 / 量子代数群 / Hーdeformable / ドラ-ム理論 / ホップ代数 / 量子群 / 代数群 / リ-代数 / KacーMoody群 / Virasoro代数 / Yang-Mills-Higgs場 / 複素旗多様体 / 基本群 / 分岐被覆 / モノドロミー群 / パッフ系 / 2次特殊線形群の水平表現 / 認容半単純元 / Hodge構造の分類空間 / 部分コンパクト化 / 新谷ゼーター関数 / Siegel尖点形式の次元予想 / 3p次の平面関数 / 特殊Hecke群の表現 / 磁場 / 相対論 / ハミルトニアン / 自己共役 / 擬微分作用素 / 定数磁場 / 多重表象 / 波動方程式 / 特異摂動 / 熱方程式 / 穴開きトーラス束 / 解消トンネル / 結び目 / 絡み輪 / canonical deccmposition / ファインマン積分 / 摂動展開 / モ-ス理論 / シンプレクティック多様体 / 間隙定理 / 代数多様体 / ディラック型作用素 / ディラック作用素 / ネーデルの不変量 / シンプレエクティック不変量 / 変形 / 小平次元 / 極複素構造 / 偏微分方程式 / シンプレクテイック幾何 / 接触幾何 / 画像処理,ブレーン宇宙 / 重力場レンズ / 反ドジッター空間 / ブレーン / 斜傾幾何学 / ルジャンドル双対性 / 双対性の曼荼羅 / 画像処理 / 反ド・シッター空間 / ガウス・ボンネ型定理 / ホロタイトはめ込み / ホロ凸 / ホロ平坦 / シンプレクテイック幾何学 / 擬球面 / 双対性 / ホロ球面 / 線形ワインガルテン曲面 / 非ブライアント型 / 3次元多様体 / ヘガード分解 / 幾何構造 / 双曲構造 / 穴あきトーラス / 曲面束 / Cannon-Thurston map / 標準的分割 / 2橋結び目 / small cancellation theory / へガード分解 / Cannon-Thurston写像 / Canonical decomposition / Cannon-Thurston-Dicks分解 / 穴あきトーラス束 / 強可逆結び目 / 垣水複体 / Montesinos knot / virtual fiber / 擬フックス群 / ザイフェルト曲面 / ワイエルストラス型表現公式 / 双曲空間の平坦曲面 / ド・ジッター空間のCMC1曲面 / 特異点に微分幾何 / 超曲面の幾何学 / 離散幾何学 / パンルヴェ方程式 / カオス性 / 量子コホモロジー / 軌道の幾何学 / 運動量写像 / 可積分な運動 / 離散変形KdV方程式 / tt戸田格子 / ミラー対称性 / クレパント解消予想 / G_2軌道 / 特異点のモデュライ / 調和写像論 / Yang-Mills接続 / 量子コホモロジー論 / K-安定性 / Donaldson-Tian-Yau予想 / テスト配位 / 佐々木アインシュタイン計量 / 偏極射影代数多様体 / トーリック微分幾何 / 複素解析幾何 / モンジュ=アンペール方程式 / 特異曲率 / 連接接束 / 交叉帽子 / 双曲空間の平坦波面 / CMC-1 曲面 / ガウス・ボンネの定理 / 双曲計量 / 共形平坦計量 / 3ノイド / 超幾何微分方程式 / wave fronts / coherent tangent bundles / front bundles / Gauss-Bonnet formula / duality / conformally flat / comnplet / ローレンツ空間形 / 光的幾何学 / 焦集合 / 光的絶対全曲率 / 光的超曲面 / 事象の地平線 / 大域的性質 / 空間的部分多様体 / 余次元 / 宇宙論 / 余次元2 / 管状部分多様体 / からビーヤオ多様体 / 変形理論 / 一般化された幾何構造 / 双エルミート構造 / 一般化されたケーラー構造 / ポアソン構造 / カラビーヤオ構造 / 一般化された複素構造 / 一般化されたケーラ－構造 / 一般化された超ケーラ－構造 / ４次元多様体の対数変換 / リッチ平坦計量 / 一般化された幾何学 / 接触構造 / 佐々木構造 / リッチ平坦ケーラー計量 / ノン-ケーラー多様体_ / 局所等角ケーラー構造 / ガウス曲率 / 直径予想 / 剛性定理 / 非線型シュレディンガー方程式 / 渦系の方程式 / 3次元等質空間 / 渦糸の方程式 / 渦糸 / 橋本変換 / 対称空間 / nonlinear Schro-dinger equation / vortex filament equation / 3-dimensional nomogeneous space / 安定解 / 時空間図形 / constant mean curvature / Einstein metric / 特殊ホロノミー群 / 超対称性 / 局所ミラー対称性 / インスタントン / 例外ホロノミー群 / 重力インスタントン / M理論 / Special Holonomy / Supersymmetry / Local Mirror Symmetry / Instanton / ラグランジアン部分多様体 / Austere部分多様体 / 型作用素 / 主曲率 / 重複度 / スペシャルラグランジアン部分多様体 / Gauss mapping / Lagrangian submanifolds / Austere submanifolds / Isoparametric hypersurfaces / Shape operators / Completely integrable systems / Surfaces of constant mean curvature / Harmonic maps / 変分問題 / 発展方程式 / 曲線 / 弾性曲線 / 非連結 / 境界 / 一般次元 / 極小部分多様体 / 平均曲率一定超曲面 / 運動方程式 / 解の滑らかさ / Variational problem / Evolution equation / curve / surface / 平坦曲面 / ワイエルストラス型表現 / CMC-1曲面 / 平坦フロント / 定平均曲率曲面 / オサーマン型不等式 / Weierstrass representation / singularities / front / maximal surface / flat surface / 等質超曲面 / 例学ホロノミー / 4元数ケーラー多様性 / サイバーグウィッテン方程式 / 等径・等質超曲面 / 例外ホロノミー / 距離空間のモジュライ / 四元数ケーラー多様体 / ラグランジュ・ルジャンドル部分多様体 / ラグランジュ錐 / DS-diagram / Einstein計量 / Seiberg-Witten不変量 / 概複素曲線 / 平均曲率-定曲面 / isoparametric hypersurface / homogeneous hypersurface / exceptional holonomy / Gauss map / constant mean curvature surface / total curvature / 4 dimensional Kahler manifold / Seiberg-Witten equation / 定スカラー曲率 / Test configuration / Hitchin-Kobayashi対応 / 定スカラー曲率ケーラー計量 / 漸近安定性 / Chow-mumford安定性 / Hilbert-mumford安定性 / extremal-Kahler計算 / 偏極代数多様体 / 存在問題 / Chow-Mumford漸近安定性 / Hilbert-Mumford漸近安定性 / Caltin-Lu-Tian-Zelditch / extremal Kahle計量 / 射影kahler多様体 / Extremal metric / Zhangの臨界計量 / 漸近的ベルグマン核 / Kahler-Einstein計量 / Chow計量 / geometry / degeneration / constant scalar curvature / 極小ラグランジュ部分多様体 / L2調和形式 / 共形型 / ハミルトン変形 / 交叉数 / フレアホモロジー / ラグランジュ部分多様体 / 交叉理論 / 平均曲率流 / トランスレイティングソリトン / リッチ流 / L2調和1形式 / トランスノーマル関数 / 等径関数 / モーメント写像 / スピン作用 / 可積分幾何 / 超曲面 / エントロピー / tt幾何 / スペシャル幾何 / 可視化 / 型変化 / ド・ジッター空間 / CMC-1 面 / 因果特性の変化 / ド・ジッター空間の平均曲率１曲面 / 波面 / 折り目特異点 / 特異性 / スピントロニクス / 垂足部分集合 / トポロジカル絶縁体 / 光化学反応 / ホログラフィー原理 / バルクエッジ対応 / バンド交差 / ツバメの尾曲面 / 垂足曲線 / グラフ型大波面 / 焦点集合 / バンド交差理論 / グラフ型波面 / Darboux枠 / 曲面・超曲面 / 退化点 / 直線定理 / 解析的延長 / 曲面・調教k面 / ローレンツ空間型 / 平均曲率一定鏡面 / 微分幾何一般(含種々の幾何構造、離散幾何) / ローレンツ幾何 Less

Differential geometrey of singularities and its applicationsPrincipal Investigator
- Principal Investigator
  
  梅原雅顕
- Project Period (FY)
  2021 – 2025
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 11020:Geometry-related
- Research Institution
  Tokyo Institute of Technology
Singularities of surfaces and hypersurfaces in Lorentzian space forms
- Principal Investigator
  
  山田光太郎
- Project Period (FY)
  2017 – 2021
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Institute of Technology
Studies on diameter conjecture on flat tori in the unit sphere
- Principal Investigator
  
  Kitagawa Yoshihisa
- Project Period (FY)
  2015 – 2017
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Utsunomiya University
Promotion of the study of curves, surfaces and hypersurfaces with singularities from the view point of differential geometryPrincipal Investigator
- Principal Investigator
  
  UMEHARA MASAAKI
- Project Period (FY)
  2014 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Institute of Technology
Surfaces with singularities in space-times and Weierstrass-type representation formulas
- Principal Investigator
  
  Yamada Kotaro
- Project Period (FY)
  2014 – 2017
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Institute of Technology
Geometric studies on singularity of non-linear phenomena
- Principal Investigator
  
  Izumiya Shyuichi
- Project Period (FY)
  2014 – 2017
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Hokkaido University
Studies on some open problems concerning flat tori in odd dimensional spheres
- Principal Investigator
  
  KITAGAWA Yoshihisa
- Project Period (FY)
  2012 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Utsunomiya University
Development of Integrable Geometry
- Principal Investigator
  
  Miyaoka Reiko
- Project Period (FY)
  2011 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Tohoku University
Geometry of curves, surfaces and hypersurfaces with singularitiesPrincipal Investigator
- Principal Investigator
  
  UMEHARA Masaaki
- Project Period (FY)
  2010 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Institute of Technology
  Osaka University
A research on the geometric singularities of non-linear phenomena
- Principal Investigator
  
  IZUMIYA Shyuichi
- Project Period (FY)
  2010 – 2013
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Hokkaido University
Geometric structures defined by differential forms (Calabi-Yau structures, generalized Kaeher structures)
- Principal Investigator
  
  GOTO Ryushi
- Project Period (FY)
  2010 – 2012
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
Differential geometric research on surfaces admitting singularities and its application
- Principal Investigator
  
  KOKUBU Masatoshi
- Project Period (FY)
  2010 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Denki University
Weierstrass-type representation formulas and their application to surfaces with singularities
- Principal Investigator
  
  YAMADA Kotaro
- Project Period (FY)
  2009 – 2013
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Institute of Technology
Geometry of Ricci solitons on complex manifolds
- Principal Investigator
  
  MABUCHI Toshiki
- Project Period (FY)
  2008 – 2012
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
Geometry of curves and surfaces with singularitiesPrincipal Investigator
- Principal Investigator
  
  UMEHARA Masaaki
- Project Period (FY)
  2007 – 2010
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
Fusion of geometry and the theory of integrable systems
- Principal Investigator
  
  MIYAOKA Reiko
- Project Period (FY)
  2007 – 2010
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geometry
- Research Institution
  Tohoku University
Differential Geometry and Partial Differential Equations as an application of Singularity theory
- Principal Investigator
  
  IZUMIYA Shyuichi
- Project Period (FY)
  2006 – 2009
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Hokkaido University
Heegaard structures and geometric structures of 3-manifolds
- Principal Investigator
  
  SAKUMA Makoto (MAKOTO Sakuma)
- Project Period (FY)
  2006 – 2009
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Hiroshima University
  Osaka University
Generalizations of Weierstrass-type representation formula and their applications to theory of surface with singularities
- Principal Investigator
  
  YAMADA Kotaro (KOTARO Yamada)
- Project Period (FY)
  2006 – 2008
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Kyushu University
Existence Problem of Fxtremal Metran and Degeneration of Balanced Metrics
- Principal Investigator
  
  MABUCHI Toshiki
- Project Period (FY)
  2004 – 2007
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
The global behavior of curves and surfaces in space formsPrincipal Investigator
- Principal Investigator
  
  UMEHARA Masaaki
- Project Period (FY)
  2003 – 2006
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
Variational problem and evolution equation of curves and surfaces
- Principal Investigator
  
  KOISO Norihito
- Project Period (FY)
  2002 – 2005
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
Generalizations of Weierstrass-type representation formulae and applications
- Principal Investigator
  
  YAMADA Kotaro
- Project Period (FY)
  2002 – 2005
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Kyushu University
Differential equations and theory of submanifolds
- Principal Investigator
  
  MIYAOKA Reiko
- Project Period (FY)
  2002 – 2003
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Kyushu University
  Sophia University
Research on surfaces of constant mean curvature one in hyperbolic space and its applicationPrincipal Investigator
- Principal Investigator
  
  UMEHARA Masaaki
- Project Period (FY)
  2001 – 2002
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  HIROSHIMA UNIVERSITY
Special'Holonomy Group and Supersymmetric Cycle
- Principal Investigator
  
  KANNO Hiroaki
- Project Period (FY)
  2000 – 2001
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Nagoya University
  Hiroshima University
Differential systems and submanifolds theory
- Principal Investigator
  
  MIYAOKA Reiko
- Project Period (FY)
  2000 – 2001
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Sophia University
Geometry of surfaces in space formsPrincipal Investigator
- Principal Investigator
  
  UMEHARA Masaaki
- Project Period (FY)
  1999 – 2000
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Hiroshima University
シンプレクティック多様体の構造論と新しい不変量の定義
- Principal Investigator
  
  榎一郎
- Project Period (FY)
  1997 – 1999
- Research Category
  
  Grant-in-Aid for Exploratory Research
- Research Field
  
  Geometry
- Research Institution
  Osaka University
Global analysis of curves and surfaces
- Principal Investigator
  
  KOISO Norihito
- Project Period (FY)
  1997 – 1999
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
A Modern Approach to Geometry of Curves and Surtaces and its ApplicationsPrincipal Investigator
- Principal Investigator
  
  UMEHARA Masaaki
- Project Period (FY)
  1997 – 1998
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  HIROSHIMA UNIVERSITY
  Osaka University
3次元多様体のへガード分解と群の階数
- Principal Investigator
  
  作間誠
- Project Period (FY)
  1995
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
3次元双曲型空間の平均曲率1の曲面Principal Investigator
- Principal Investigator
  
  梅原雅顕
- Project Period (FY)
  1995
- Research Category
  
  Grant-in-Aid for Encouragement of Young Scientists (A)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
ファインマン積分とその摂動展開から導出される幾何学的不変量の研究
- Principal Investigator
  
  榎一郎
- Project Period (FY)
  1995
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
Nonlinear Schrodinger eqnations on riemannian manitolds
- Principal Investigator
  
  KOISO Norihito
- Project Period (FY)
  1995 – 1996
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
弾性波動方程式の研究
- Principal Investigator
  
  KOISO Norihito
- Project Period (FY)
  1994
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
3次元ユークリッド空間の極小曲面とその自然な双曲型空間への変形についてPrincipal Investigator
- Principal Investigator
  
  梅原雅顕
- Project Period (FY)
  1994
- Research Category
  
  Grant-in-Aid for Encouragement of Young Scientists (A)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
物理数学の方程式と擬微分作用素論
- Principal Investigator
  
  長瀬道弘
- Project Period (FY)
  1993
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Osaka University
双曲的ガウス写像による3次元双曲型空間内の平均曲率1の曲面の構成Principal Investigator
- Principal Investigator
  
  梅原雅顕
- Project Period (FY)
  1993
- Research Category
  
  Grant-in-Aid for Encouragement of Young Scientists (A)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
リーマン面上のベクトル束の幾何学
- Principal Investigator
  
  ITOH Mitsuhiro
- Project Period (FY)
  1992
- Research Category
  
  Grant-in-Aid for Scientific Research on Priority Areas
- Research Institution
  University of Tsukuba
複素多様体の基本群と分岐被覆
- Principal Investigator
  
  NAMBA Makoto
- Project Period (FY)
  1992
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  代数学・幾何学
- Research Institution
  Osaka University
代数多様体のHodge理論
- Principal Investigator
  
  USAI Sampei
- Project Period (FY)
  1992
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  代数学・幾何学
- Research Institution
  Osaka University
極小部分多様体とその位相的,群論的研究
- Principal Investigator
  
  高橋恒郎
- Project Period (FY)
  1990
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  代数学・幾何学
- Research Institution
  University of Tsukuba
ホップ代数,代数群,量子群の表現とその応用
- Principal Investigator
  
  竹内光弘
- Project Period (FY)
  1990
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  代数学・幾何学
- Research Institution
  University of Tsukuba

[Book] 特異点をもつ曲線と曲面の微分幾何学2017
- Author(s)
  梅原雅顕・山田光太郎・佐治健太郎
- Total Pages
  319
- Publisher
  丸善出版
- ISBN
  9784621302156
- Data Source
  KAKENHI-PROJECT-26247005
[Book] Punctured torus groups and 2-bridge knot groups, Lecture Notes in Math. 19092007
- Author(s)
  Hirotaka Akiyoshi, Makoto Sakuma, Masaaki Wada and Yasushi Yamashita
- Publisher
  Springer, Berline
- Data Source
  KAKENHI-PROJECT-18340018
[Book] Punctured torus groups and 2-bridge knot groups, Lecture Notes in Math. 19092007
- Author(s)
  Hirotaka Akiyoshi, Makoto Sakuma, Masaaki Wada, Yasushi Yamashita
- Publisher
  Springer, Berline
- Data Source
  KAKENHI-PROJECT-18340018
[Journal Article] Graph manifolds as ends of negatively curved Riemannian manifolds2021
- Author(s)
  Akamine S.、Umehara M.、Yamada K.
- Journal Title
  
  Geometry & Topology
  
  Volume: 7 Pages: 17-27
- DOI
  10.1090/bproc/44
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19K14527, KAKENHI-PROJECT-17H02839, KAKENHI-PROJECT-16H03937
[Journal Article] Analytic extension of exceptional constant mean curvature one catenoids in de Sitter 3-space2020
- Author(s)
  Fujiori S., Kawakami, Y., Kokubu, M., Rossman, W., Umehara M., Yamada, K.
- Journal Title
  
  Mathematical Journal of Okayama University
  
  Volume: 62 Pages: 179-195
- NAID
  120006778830
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17H02839
[Journal Article] Hypersurfaces with light-like points in a Lorentazian manifold2019
- Author(s)
  M. Umehara, K. Yamada
- Journal Title
  
  J. Geom. Analy. (2019) 20:3405-3437
  
  Volume: 印刷中 Pages: 1-33
- DOI
  10.1007/s12220-018-00118-7
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26247005, KAKENHI-PROJECT-17H02839, KAKENHI-PROJECT-16H03937
[Journal Article] Space-like maximal surfaces containing entire null lines in Lorentz-Minkowski 3-space2019
- Author(s)
  Akamine Shintaro、Umehara Masaaki、Yamada Kotaro
- Journal Title
  
  Proceedings of the Japan Academy, Series A, Mathematical Sciences
  
  Volume: 95 Pages: 97-102
- DOI
  10.3792/pjaa.95.97
- NAID
  40022077001
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17H02839
[Journal Article] Isometric realization of cross caps as formal power series and its applications2019
- Author(s)
  HONDA Atsufumi、NAOKAWA Kosuke、UMEHARA Masaaki、YAMADA Kotaro
- Journal Title
  
  Hokkaido Mathmatical Journal
  
  Volume: 48 Pages: 1-44
- DOI
  10.14492/hokmj/1550480642
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14197, KAKENHI-PROJECT-26247005, KAKENHI-PROJECT-16K17605
[Journal Article] Analytic extension of exceptional constant mean curvature　 one catenoids in de Sitter 3-space2019
- Author(s)
  S. Fujimori，Y. Kawakami,　M. Kokubu，W. Rossman, M. Umehara, K. Yamada
- Journal Title
  
  Math. J. Okayama Univ.
  
  Volume: 印刷中
- NAID
  120006778830
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26247005
[Journal Article] Isometric realization of cross caps as formal power series and its applications2019
- Author(s)
  Honda, A., Naokawa, K., Umehara, M., Yamada, K.
- Journal Title
  
  Hokkaido Mathematical Journal
  
  Volume: 48 Pages: 1-44
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17H02839
[Journal Article] Isometric realization of cross caps as formal power series and its applications2018
- Author(s)
  A. Honda, K. Naokawa, M. Umehara, K. Yamada
- Journal Title
  
  Hokkaido Mathmatical Journal
  
  Volume: 印刷中
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26247005
[Journal Article] Quadrics and Scherk towers2018
- Author(s)
  Fujimori S.、Hertrich-Jeromin U.、Kokubu M.、Umehara M.、Yamada K.
- Journal Title
  
  Monatschefte fuer Mathematik
  
  Volume: - Pages: 249-279
- DOI
  10.1007/s00605-017-1075-5
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K05227, KAKENHI-PROJECT-26247005, KAKENHI-PROJECT-17K05219, KAKENHI-PROJECT-16H03937, KAKENHI-PROJECT-17H02839
[Journal Article] 特異点の微分幾何学ー３次元時空の極大曲面をテーマにしてー2018
- Author(s)
  梅原雅顕
- Journal Title
  
  応用数理
  
  Volume: 28 Pages: 86-89
- NAID
  130007491674
- Data Source
  KAKENHI-PROJECT-26247005
[Journal Article] Surfaces with light-like points in Lorentz-Minkowski 3-space with applications2018
- Author(s)
  Masaaki Umehara, Kotaro Yamada
- Journal Title
  
  Springer Proceedings of Mathematics and Statics
  
  Volume: 211 Pages: 253-273
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26247005
[Journal Article] C^1-umbilics with arbitrarily high indices2017
- Author(s)
  N. Ando, T. Fujiyama and M. Umehara
- Journal Title
  
  Pacific Journal of Mathematics
  
  Volume: 288 Pages: 1-26
- DOI
  10.2140/pjm.2017.288.1
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26247005, KAKENHI-PROJECT-17K05221
[Journal Article] Analytic extension of Jorge-Meeks type maximal surfaces in Lorentz-Minkowski 3-space2017
- Author(s)
  S.Fujimori, Y. Kawakami, M. Kokubu, W. Rossman, M. Umehara, K. Yamada
- Journal Title
  
  Osaka Journal of Mathematics
  
  Volume: 54 Pages: 249-272
- NAID
  120006312701
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26247005
[Journal Article] Analytic extension of Jorge-Meeks type maximal surfaces in Lorentz-Minkowski 3-space2017
- Author(s)
  S. Fujimori, Y. Kawakami, M. Kokubu, W. Rossman, M. Umehara, K. Yamada
- Journal Title
  
  Osaka Journal of Mathematics
  
  Volume: 印刷中
- NAID
  120006312701
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26247005
[Journal Article] Mixed type surfaces with bounded mean curvatures in 3-dimensional space-times2017
- Author(s)
  A. Honda, M. Koiso, M. Kokubu, M. Umehara and Kotaro Yamada
- Journal Title
  
  Differential Geometry and Its Applications
  
  Volume: 52 Pages: 64-77
- DOI
  10.1016/j.difgeo.2017.03.009
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-26247005, KAKENHI-PROJECT-25287012, KAKENHI-PROJECT-26520205, KAKENHI-PROJECT-26610016, KAKENHI-PROJECT-26400066, KAKENHI-PROJECT-17K05227, KAKENHI-PROJECT-16K17605
[Journal Article] Surfaces with light-like points in Lorentz-Minkowski 3-space with applications2017
- Author(s)
  Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Springer Proceedings in Mathematics & Statistics
  
  Volume: 211 Pages: 253-273
- DOI
  10.1007/978-3-319-66290-9_14
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26400066, KAKENHI-PROJECT-17H02839
[Journal Article] An index formula for a bundle homomorphism of the tangent bundle into a vector bundle of the same rank, and its applications2017
- Author(s)
  K. Saji, M. Umehara and K. Yamada
- Journal Title
  
  J. Math. Soc. Japan
  
  Volume: 69 Issue: 1 Pages: 417-457
- DOI
  10.2969/jmsj/06910417
- NAID
  130005310476
- ISSN
  0025-5645, 1881-1167, 1881-2333
- Language
  English
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26247005, KAKENHI-PROJECT-16H03937
[Journal Article] Entire zero mean curvature graphs of mixed type in Lorentz-Minkowski 3-space2017
- Author(s)
  S. Fujimori, Y. Kawakami, M. Kokubu, W. Rossman, M. Umehara, K. Yamada
- Journal Title
  
  The Quarterly Journal of Mathematics
  
  Volume: 67 Pages: 1-37
- DOI
  10.1093/qmath/haw038
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26247005, KAKENHI-PROJECT-16H03937, KAKENHI-PROJECT-25287012, KAKENHI-PROJECT-25800047, KAKENHI-PROJECT-15K04840, KAKENHI-PROJECT-26400066
[Journal Article] Isometric deformations of cuspidal edges2016
- Author(s)
  K. Naokawa, M. Umehara, and K. Yamada
- Journal Title
  
  Tohoku Math. J.
  
  Volume: 68
- NAID
  130008106069
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26247005
[Journal Article] Behavior of Gaussian curvature and mean curvature near non-degenerate singular points on wave fronts2016
- Author(s)
  Luciana F, Martins, Kentaro Saji, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Geometry and topology of manifolds, Springer Proc. Math. Stat.
  
  Volume: 154 Pages: 247-281
- DOI
  10.1007/978-4-431-56021-0_14
- Peer Reviewed / Acknowledgement Compliant / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26400066, KAKENHI-PROJECT-26400087
[Journal Article] ISOMETRIC DEFORMATIONS OF CUSPIDAL EDGES2016
- Author(s)
  K. Naokawa, M. Umehara and K. Yamada
- Journal Title
  
  Tohoku Math. J.
  
  Volume: 68 Issue: 1 Pages: 73-90
- DOI
  10.2748/tmj/1458248863
- NAID
  130008106069
- ISSN
  0040-8735, 2186-585X
- Language
  English
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26400066
[Journal Article] Zero mean curvature surfaces in Lorentz-Minkowski 3-space and 2-dimensional fluid mechanics2015
- Author(s)
  S. Fujimori, Y. W. Kim, S.-E. Koh, W. Rossman, H. Shin, M. Umehara,K. Yamada and S.-D. Yang
- Journal Title
  
  Math. J. Okayama Univ.
  
  Volume: 57
- NAID
  120005525349
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-26247005
[Journal Article] Intrinsic properties of singularities of surfaces2015
- Author(s)
  M. Hasegawa, A. Honda, K. Naokawa, K. Saji, M. Umehara, K. Yamada
- Journal Title
  
  eitraege zur Algebra und Geometrie / Contributions to Algebra and Geometry
  
  Volume: 26 Pages: 1-34
- DOI
  10.1142/s0129167x1540008x
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-14J00101, KAKENHI-PROJECT-26400066, KAKENHI-PROJECT-26400087, KAKENHI-PROJECT-26247005, KAKENHI-PROJECT-24340013
[Journal Article] Intrinsic Deformation of Cuspidal Edges2015
- Author(s)
  Kosuke Naokawa, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Tohoku Mathematical Jourrnal
  
  Volume: -
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26400066
[Journal Article] Zero mean curvature surfaces in Lorentz-Minkowski 3-space which change type across a light-like line2015
- Author(s)
  S. Fujimori, Y. W. Kim, S.-E. Koh, W. Rossman, H. Shin, M. Umehara, K. Yamada and S.-D. Yang
- Journal Title
  
  Osaka J. Math.
  
  Volume: 52
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-26247005
[Journal Article] A construction of a complete bounded null curve in C32014
- Author(s)
 L. Ferrer, F. Martin, M. Umehara and K. Yamada
- Journal Title
 
 KMJ
 
 Volume: 37 Issue: 1 Pages: 59-96
- DOI
 10.2996/kmj/1396008249
- NAID
 130004496212
- ISSN
 0386-5991, 1881-5472
- Language
 English
- Peer Reviewed
- Data Source
 KAKENHI-PROJECT-22244006
[Journal Article] Erratum to: Extrinsic diameter of immersed flat tori in S^32014
- Author(s)
  Y.Kitagawa, M.Umehara
- Journal Title
  
  Geometriae Dedicata
  
  Volume: 171
- DOI
  10.1007/s10711-013-9900-z
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-24540066
[Journal Article] A construction of a complete bounded null curve in C32014
- Author(s)
  Leonor Ferrer, Francisco Martin, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Kodai Mathematical Journal
  
  Volume: 37 Pages: 59-96
- NAID
  130004496212
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Embedded triply periodic zero mean curvature surfaces of mixed type in Lorentz-Minkowski 3-space2014
- Author(s)
  S. Fujimori, W. Rossman, M. Umehara, K. Yamada and S.-D. Yang
- Journal Title
  
  Michigan Mathematical Journal
  
  Volume: 63 Pages: 189-207
- DOI
  10.1307/mmj/1395234364
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-22244006, KAKENHI-PROJECT-25800047, KAKENHI-PROJECT-24224001
[Journal Article] Flat surfaces in hyperbolic 3-space whose hyperbolic Gauss maps are bounded2014
- Author(s)
  Francisco Martín, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Rev. Mat. Iberoam.
  
  Volume: 30
- DOI
  10.4171/rmi/779
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016, KAKENHI-PROJECT-22244006
[Journal Article] Flat surfaces in hyperbolic 3-space whose hy perbolic Gauss maps are bounded2014
- Author(s)
  Francisco Martin, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Revista Matemtica Iberoamericana
  
  Volume: 30 Pages: 309-316
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Intrinsic invariants of cross caps2014
- Author(s)
  Masaru Hasegawa, Atsufumi Honda, Kosuke Naokawa, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Selecta Math. New Ser.
  
  Volume: 20130730
- DOI
  10.1007/s00029-013-0134-6
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-21340016, KAKENHI-PROJECT-22244006, KAKENHI-PROJECT-24340013, KAKENHI-PROJECT-26247005
[Journal Article] Hyperbolic Metrics on Riemann Surfaces and Space-Like CMC-1 Surfaces in de Sitter 3-Space2013
- Author(s)
  Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu, Wayne Rossman, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Springer Proceedings in Mathematics & Statistics
  
  Volume: 26 Pages: 1-47
- DOI
  10.1007/978-1-4614-4897-6
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740052, KAKENHI-PROJECT-22540100
[Journal Article] Closed planar curves without inflections2013
- Author(s)
  S. Ohno, T. Ozawa and M. Umehara
- Journal Title
  
  Proc. Amer. Math. Soc.
  
  Volume: 141
- DOI
  10.1090/s0002-9939-1991-1043406-7
- Data Source
  KAKENHI-PROJECT-22244006
[Journal Article] Hyperbolic metrics on Riemann surfaces and space-like CMC-1 Surfaces in de Sitter 3-Space in "Recent Trends in Lorentzian Geometry"2013
- Author(s)
  Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu, Wayne Rossman, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Springer Proceedings in Mathematics & Statistics
  
  Volume: 26 Pages: 1-47
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Coherent tangent, bundles and Gauss-Bonnet formulas for wave fronts2012
- Author(s)
  Kentaro Saji, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  J. Geom. Anal.
  
  Volume: vol.22 Pages: 383-409
- DOI
  10.1007/s12220-010-9193-5
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016, KAKENHI-PROJECT-22244006, KAKENHI-PROJECT-23740045, KAKENHI-PROJECT-24340013
[Journal Article] A refinement of Foreman's four vertex theorem and its dual version2012
- Author(s)
  Throbergsson and M. Umehara
- Journal Title
  
  Kyoto J. Math.
  
  Volume: 52
- DOI
  10.1215/21562261-1728848
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22244006
[Journal Article] Zero mean curvature surfaces in L3 containing a light-like line, Comptes Rendus Mathematique2012
- Author(s)
  Shoichi Fujimori
- Journal Title
  
  C. R. Math. Acad. Sci. Paris
  
  Volume: 350 Pages: 975-978
- DOI
  10.1016/j.crma.2012.10.024
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016, KAKENHI-PROJECT-21740052, KAKENHI-PROJECT-22244006, KAKENHI-PROJECT-24340013
[Journal Article] Zero mean curvature surfaces in L3 containing a light-like line2012
- Author(s)
  Shoichi Fujimori, Young Wook Kim, Sung-Eun Koh, Wayne Rossman, Heayong Shin, Hidenobu Takahashi, Masaaki Umehara, Kotaro Yamada, Seong-Deog Yang
- Journal Title
  
  Comptes Reudus de l'Acadmie Sci. Srie I. Mathmatique
  
  Volume: vol.350 Pages: 975-978
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Corrigendum : Applications of a completeness lemma in minimal surface theory to various classes of surfaces2012
- Author(s)
  Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Bulletin of the London Mathematical Society
  
  Volume: vol.44 Pages: 617-618
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] The behavior of curvature functions at cusps and inflection points2012
- Author(s)
  S. Shiba and M. Umehara
- Journal Title
  
  Differential Geometry and its Applications
  
  Volume: 30
- DOI
  10.1016/j.difgeo.2012.04.001
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22244006
[Journal Article] Applications of a completeness lemma in minimal surface theory to various classes of surfaces2011
- Author(s)
  Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Bulletin of the London Mathematical Society
  
  Volume: vol.43 Pages: 191-199
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] A2-singularities of hypersurfaces with non-negative sectional curvature in Euclidean space2011
- Author(s)
  Kentaro Saji, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Kodai Mathematical Journal
  
  Volume: vol.34 Pages: 390-409
- NAID
  130004687956
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Applications of a completeness lemma in minimal surface theory to various classes of surfaces2011
- Author(s)
  M.Umehara, K.Yamada
- Journal Title
  
  Bulletin of the London Mathematical Society
  
  Volume: 43 Pages: 191-199
- DOI
  10.1112/blms/bds017
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22244006
[Journal Article] CMC-1 trinoids in hyperbolic 3-space and metrics of constant curvature one with conical singularities on the 2-sphere2011
- Author(s)
  S.Fujimori, K.Yamada, et.al.
- Journal Title
  
  Proc.Japan Acad.Ser.A Math.Sci.
  
  Volume: 87 Pages: 144-149
- DOI
  10.3792/pjaa.87.144
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016, KAKENHI-PROJECT-21740052, KAKENHI-PROJECT-21740053, KAKENHI-PROJECT-22244006, KAKENHI-PROJECT-22540100
[Journal Article] The duality of conformally flat manifolds2011
- Author(s)
  H.L.Liu, M.Umehara, K.Yamada
- Journal Title
  
  Bulletin of the Brasilian Mathematical Society
  
  Volume: 42 Pages: 131-152
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Applications of a completeness lemma in minimal surface theory to various classes of surfaces2011
- Author(s)
  Masaaki Umehara, Kotaro Yamada
- Journal Title
  
  Bulletin of the London Mathematical Society
  
  Volume: 43 Pages: 191-199
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Extrinsic diameter of immersed flat tori in S^32011
- Author(s)
  Y.Kitagawa, M.Umehara
- Journal Title
  
  Geom.Dedicata
  
  Volume: 155 Pages: 105-140
- DOI
  10.1007/s10711-011-9580-5
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22244006
[Journal Article] A2-singularities of hypersurfaces with non-negative sectional curvature in Euclidean space2011
- Author(s)
 K.Saji, M.Umehara, K.Yamada
- Journal Title
 
 KMJ
 
 Volume: 34 Issue: 3 Pages: 390-409
- DOI
 10.2996/kmj/1320935549
- NAID
 130004687956
- ISSN
 0386-5991, 1881-5472
- Language
 English
- Peer Reviewed
- Data Source
 KAKENHI-PROJECT-22244006
[Journal Article] The duality of conformally flat manifolds2011
- Author(s)
  Masaaki Umehara, Kotaro Yamada
- Journal Title
  
  Bulletin of the Brasilian Mathematical Society
  
  Volume: 42 Pages: 131-152
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Orientability of linear Weingarten surfaces, spacelike CMC-1 surfaces and maximal surfaces2011
- Author(s)
  M.Kokubu and M.Umehara
- Journal Title
  
  Math.Nachr.
  
  Volume: 284 Pages: 1903-1918
- DOI
  10.1002/mana.200910176
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20244005, KAKENHI-PROJECT-22244006, KAKENHI-PROJECT-22540100
[Journal Article] A_2 singularities of hypersurfaces with non-negative sectional curvature…2011
- Author(s)
  K.Saji, M.Umehara, K..Yamada
- Journal Title
  
  Kodai Mathematical Journal
  
  Volume: 34 Pages: 390-409
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] The duality of conformally flat manifolds Bulletin of the Brasilian Mathematical Society2011
- Author(s)
  Huili Liu, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  N. S.
  
  Volume: vol.42 Pages: 131-152
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] CMC-1 trinoids in H3 and metrics of constant curvature one with conical singularities on S22011
- Author(s)
  Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu, Wayne Rossman, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Proceedings of Japan Academy
  
  Volume: vol.87,Ser.A Pages: 144-149
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] A simplification of the proof of Bol's conjecture on sextactic points2011
- Author(s)
  M.Umehara
- Journal Title
  
  Proc.Japan Acad.Ser.A
  
  Volume: 87 Pages: 10-12
- DOI
  10.3792/pjaa.87.10
- NAID
  40017436335
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22244006
[Journal Article] The duality of conformally flat manifolds2011
- Author(s)
  M.Umehara, K.Yamada
- Journal Title
  
  Boll.London Math.Soc. 43
  
  Pages: 191-199
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] The duality of conformally flat manifolds2011
- Author(s)
  Huili Liu, M.Umehara, K.Yamada
- Journal Title
  
  Bulletin of the Brasilian Mathematical Society
  
  Volume: 42 Pages: 131-152
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22244006
[Journal Article] The duality between singular points and inflection points on wave fronts2010
- Author(s)
  Masaaki Umehara, Kotaro Yamada
- Journal Title
  
  Osaka Journal of Mathematics
  
  Volume: 47 Pages: 591-607
- NAID
  120004844268
- Peer Reviewed
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  KAKENHI-PROJECT-19204006
[Journal Article] Singularities of Blaschke normal maps of convex surfaces2010
- Author(s)
  K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Comptes Reudus de l'Academie Sciences. Serie I.
  
  Volume: 348 Pages: 41-82
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] The duality between singular points and inflection points on wave fronts2010
- Author(s)
  K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Osaka J.Math.
  
  Volume: 47 Pages: 591-607
- NAID
  120004844268
- Peer Reviewed
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  KAKENHI-PROJECT-22244006
[Journal Article] A simplification of the proof of Bol's conjecture on sextactic points2010
- Author(s)
  Masaaki Umehara
- Journal Title
  
  Proc.Japan Acad.Ser.A
  
  Volume: 87 Pages: 10-12
- NAID
  40017436335
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] The duality between singular points and inflection points on wave fronts2010
- Author(s)
  Kentaro Saji, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Osaka Journal of Mathematics
  
  Volume: vol.47 Pages: 591-607
- NAID
  120004844268
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Applications of completeness lemma in minimal surface theory to various classes of surfaces2010
- Author(s)
  M.Umehara, K.Yamada
- Journal Title
  
  Bulletin of the London Mathematical Society
  
  Volume: 43 Pages: 191-199
- Peer Reviewed
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  KAKENHI-PROJECT-21340016
[Journal Article] Singularities of Blaschke normal maps of convex surfaces2010
- Author(s)
  Kentaro Saji, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Comptes Reudus de l'Acadmie Sciences. Srie I. Mathmatique
  
  Volume: vol.348 Pages: 665-668
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] The duality between singular points and inflection points on wave fronts2010
- Author(s)
  K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Osaka Journal of Mathematics
  
  Volume: 47 Pages: 591-607
- NAID
  120004844268
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Singularities of Blaschke normal maps of convex surfaces2010
- Author(s)
  K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  C.R.Acad.Sci.Paris.Ser.I
  
  Volume: 348 Pages: 665-668
- Peer Reviewed
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  KAKENHI-PROJECT-22244006
[Journal Article] Singularities of Blaschke normal maps of convex surfaces2010
- Author(s)
  Masaaki Umehara, Kotaro Yamada
- Journal Title
  
  Comptes Reudus de I'Academie Sciences. Serie I.Mathematique
  
  Volume: 348 Pages: 665-668
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] The geometry of fronts2009
- Author(s)
  K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Ann.of Math. 169
  
  Pages: 491-529
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] The geometry of fronts2009
- Author(s)
  K. Saji, M. Umehara, K. Yamada
- Journal Title
  
  Ann. of Math 169
  
  Pages: 491-529
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] A_k singularities of wave fronts2009
- Author(s)
  M. Umehara
- Journal Title
  
  Math. Proceedings of Cambridge Philosophical Society (to appear)
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Asymptotic behavior of flat surfaces in hyperbolic 3-space2009
- Author(s)
  M.Kokubu, W.Rossman, M.Umehara K.Yamada
- Journal Title
  
  J.Math.Soc.Japan 61
  
  Pages: 799-852
- NAID
  10026998469
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Complete bounded null curves immersed in C3 and PSL (2, C)2009
- Author(s)
  F. Martin, M. Umehara, K. Yamada
- Journal Title
  
  Calculus of Variations and Partial Differential Equations 36
  
  Pages: 119-139
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Spacelike mean curvature one surfaces in de Sitter 3-space2009
- Author(s)
  S.Fujimori, W.Rossman, M.Umehara K.Yamada, S.-D.Yang
- Journal Title
  
  Communications in Analysis and Geometgry 17
  
  Pages: 383-427
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] New maximal surfaces in Minkowski 3-space with arbitrary genus and their cousins in de Sitter 3-space2009
- Author(s)
  S.Fujimori, W.Rossman, M.Umehara K.Yamada, S.D.Yang
- Journal Title
  
  Results in Math. 56
  
  Pages: 41-82
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] The geometry of fronts2009
- Author(s)
  K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Annals of Mathematics 169
  
  Pages: 491-529
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Asymptotic behavior of flat surface in hyperbolic 3-space2009
- Author(s)
  M.Kokubu, W.Rossman, M.Umehara, K.Yamada
- Journal Title
  
  Journal of the Mathematical Society of Japan 61
  
  Pages: 799-852
- NAID
  10026998469
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Mathematical Proceedings of the Cambridge Philosophical Society2009
- Author(s)
  K. Saji, M. Umehara, K. Yamada, Ak singularities of wave fronts
- Journal Title
  
  Volume 146
  
  Pages: 731-746
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] New maximal surfaces in Minkowski 3-space with arbitrary genus and their cousins in de Sitter 3-space2009
- Author(s)
  Shoichi Fujimori, Wayne Rossman, Masaaki Umehara, Kotaro Yamada and Seog-Deong Yang
- Journal Title
  
  Results in Mathematics
  
  Volume: vol.56 Pages: 41-82
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Complete bounded null curves immersed in C3 and PSL(2, C)2009
- Author(s)
  F.Martin, M.Umehara, K.Yamada
- Journal Title
  
  Calculus of Variations and Partial Differential Equations 36
  
  Pages: 119-139
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Spacelike mean curvature one surfaces in de Sitter 3-space2009
- Author(s)
  S.Fuuimori, W.Rossman, M.Umehara, K.Yamada, S.-D.Yang
- Journal Title
  
  Communications in Analysis and Geometgry 17
  
  Pages: 383-427
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Complete bounded null curves immersed in C^3 and PSL(2,C)2009
- Author(s)
  F.Martin, M.Umehara, K.Yamada
- Journal Title
  
  Calculus of Variations and Partial Differential Equations 36
  
  Pages: 119-139
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Flat surfaces with singularities in Euclidean 3-space2009
- Author(s)
  S. Murata, M. Umehara
- Journal Title
  
  journal of Differential Geometry 82
  
  Pages: 279-316
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Spacelike mean curvature one surfaces in de Sitter $3$-space2009
- Author(s)
  S.Fujimori, W.Rossman, M.Umehara K.Yamada, S.-D.Yang
- Journal Title
  
  Communications in Analysis and Geometgry 17
  
  Pages: 383-427
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Flat surfaces with singularities in Euclidean 3-space2009
- Author(s)
  S.Murata, M.Umehara
- Journal Title
  
  Journal of Differential Geometry 82
  
  Pages: 279-316
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Complete bounded holomorphic curves immersed in C^2 with arbitrary genus2009
- Author(s)
  F.Martin, M.Umehara, K.Yamada,
- Journal Title
  
  Proc.Amer.Math.Soc. 137
  
  Pages: 3437-3450
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Ak singularities of wave fronts2009
- Author(s)
  K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Mathematical Proceedings of the Cambridge Philosophical Society 146
  
  Pages: 731-746
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Complete bounded null curves immersed in C^3 and PSL(2, C)2009
- Author(s)
  F.Martin, M.Umehara, K.Yamada
- Journal Title
  
  Calculus of Variations and Partial Differential Equations 36
  
  Pages: 119-139
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] The geometry of fronts2009
- Author(s)
  K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Ann. of Math. 169
  
  Pages: 491-529
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] A_k singularities of wave fronts2009
- Author(s)
  K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Math.Proc.of the Cambridge Philosophical Soc. 146
  
  Pages: 731-746
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] New Maximal Surfaces in Minkowski 3-Space with Arbitary Genus and Their Cousins in de Sitter 3-Space2009
- Author(s)
  S.Fujimori, W.Rossman, M.Umehara, K.Yamada, S-D.Yang
- Journal Title
  
  Result.Math. 56
  
  Pages: 41-82
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Complete bounded holomorphic curves immersed in C^2 with arbitrary genus2009
- Author(s)
  F.Martin, M.Umehara, K.Yamada
- Journal Title
  
  Proc.Amer.Math.Soc. 137
  
  Pages: 3437-3450
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Spacelike mean curvature one surfaces in de Sitter 3-space2009
- Author(s)
  Shoichi Fujimori, Wayne Rossman, Masaaki Umehara, Kotaro Yamada and Seog-Deong Yang
- Journal Title
  
  Communucations in Analysis and Geometry
  
  Volume: vol.17 Pages: 383-427
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] The geometry of fronts2009
- Author(s)
  K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Annals of Mathematics 169
  
  Pages: 491-529
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Asymptotic behavior of flat surfaces in hyperbolic 3-space2009
- Author(s)
  M.Kokubu, W.Rossman, M.Umehara, K.Yamada
- Journal Title
  
  Journal of the Math.Soc.Japan 61
  
  Pages: 799-852
- NAID
  10026998469
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] The geometry of fronts2009
- Author(s)
  K. Saji, M. Umehara, K. Yamada
- Journal Title
  
  Annals of Mathematics vol.169
  
  Pages: 491-529
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18340019
[Journal Article] A_k singularities of wave fronts2009
- Author(s)
  K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Mathematical Proceedings of the Cambridge Philosophical Society 146
  
  Pages: 731-746
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] New maximal surfaces in Minkowski 3-space with arbitrary genus and their cousins in de Sitter 3-space2009
- Author(s)
  S.Fujimori, W.Rossman, M.Umehara, K.Yamada, S.D.Yang
- Journal Title
  
  Results in Math. 56
  
  Pages: 41-82
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Complete bounded holomorphic curves immersed in C2 with arbitrary genus2009
- Author(s)
  Francisco Martin, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Proceedings of the American Mathematical Society
  
  Volume: vol.137 Pages: 3437-3450
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Asymptotic behavior of flat surface in hyperbolic 3-space2009
- Author(s)
  M.Kokubu, W.Rossman, M.Umehara, K.Yamada
- Journal Title
  
  Journal of the Mathematical Society of Japan 61
  
  Pages: 799-852
- NAID
  10026998469
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Singularities of Maxial surfaces2008
- Author(s)
  S. Fujimori, K. Saji, M. Umehara and K. Yamada
- Journal Title
  
  Math. Z. 259
  
  Pages: 827-848
- Data Source
  KAKENHI-PROJECT-18340019
[Journal Article] Cuspidal cross caps and singularities of maximal surfaces2008
- Author(s)
  S. Fujimori, K. Saji, M. Umehara, K. Yamada
- Journal Title
  
  Mathematische Zeitschrift 259
  
  Pages: 827-848
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Singularities of maximal surfaces2008
- Author(s)
  S.Fujimori, K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Math.Z. 259
  
  Pages: 827-848
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Singularities of maximal surfaces2008
- Author(s)
  S. Fujimori, K. Saji, M. Umehara, K. Yamada
- Journal Title
  
  Mathematische Zeitschrift vol.259
  
  Pages: 1827-848
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18340019
[Journal Article] A_k singularities of wave fronts2008
- Author(s)
  M. Umehara
- Journal Title
  
  Kyushu Journal of Mathematics 62
  
  Pages: 259-280
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Inflection points and double tangents on anti-convex curves in the real projective plane2008
- Author(s)
  M. Umehara
- Journal Title
  
  Tohoku Math. J. 60
  
  Pages: 149-181
- NAID
  110006691406
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Singularities of maximal surfaces2008
- Author(s)
  S. Fujimori, K. Saji, M. Umehara, K. Yamada
- Journal Title
  
  Math. Z 259
  
  Pages: 827-848
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Flat Moebius strips of given isotopy type in R^3 whose centerlines are geodesic or lines of curvature2008
- Author(s)
  Y. Kurono, M. Umehara
- Journal Title
  
  Geometriae Dedicata 134
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Inflection points and double tangents on anti-convex curves in the real projective plane2008
- Author(s)
  G.Thorbergsson, M.Umehara
- Journal Title
  
  Tohoku Mathematical Journal 60
  
  Pages: 149-181
- NAID
  110006691406
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Inflection points and double tangents on anti-convex curves in the real projective plane2008
- Author(s)
  G. Thorbergsson, M. Umehara
- Journal Title
  
  Tohoku Mathematical Journal 60
  
  Pages: 149-181
- NAID
  110006691406
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Flat Mobius strips of given isotopy type in R3 whose centerlines are geodesic or lines of curvature2008
- Author(s)
  M. Umehara
- Journal Title
  
  Geom. Dedicata 134
  
  Pages: 109-130
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204006
[Journal Article] Behavior of corank one singular points on weve fronts2008
- Author(s)
  K. Saji, M. Umehara and K. Yamada
- Journal Title
  
  Kyushu J. Math. 62
  
  Pages: 259-280
- Data Source
  KAKENHI-PROJECT-18340019
[Journal Article] FLat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  M.Kokubu, W.Rossman, M.Umehara, K.Yamada
- Journal Title
  
  Journal of the Mathematical Society of Japan vol.59
  
  Pages: 265-299
- NAID
  10019540696
- Data Source
  KAKENHI-PROJECT-16204006
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  M.Kokubu, W.Rossman, M.Umehara, K.Yamada
- Journal Title
  
  J. Math. Soc. Japan 59
  
  Pages: 265-299
- NAID
  10019540696
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  M. Kokubu, W. Rossman, M. Umehara and K. Yamada
- Journal Title
  
  Journal of the Mathematical Society of Japan 265--299
  
  Pages: 59-59
- NAID
  10019540696
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  M. Kokubu, M. Umehara, K. Yamada
- Journal Title
  
  Journal of Mathematical Society of Japan vol.59(1)
  
  Pages: 265-299
- NAID
  10019540696
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18340019
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  M. Kokubu, W. Rossman, M. Umehara, K. Yamada
- Journal Title
  
  J. Math. Soc. Japan 59
  
  Pages: 265-299
- NAID
  10019540696
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16204006
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  M.Kokubu , W. Rossman, M. Umehara and K. Yamada
- Journal Title
  
  J. of Math. Soc. Japan 50
  
  Pages: 265-299
- NAID
  10019540696
- Data Source
  KAKENHI-PROJECT-18340019
[Journal Article] Maximal surfaces with singularities in Minkowski space2006
- Author(s)
  Masaaki UMEHARA, Kotaro YAMADA
- Journal Title
  
  Hokkaido Mathematical Journal 35.1
  
  Pages: 13-40
- Data Source
  KAKENHI-PROJECT-18340019
[Journal Article] Maximal surfaces with singularities in Minkowski space2006
- Author(s)
  M. Umehara, K. Yamada
- Journal Title
  
  Hokkaido Mathematical Journal vol.35(1)
  
  Pages: 13-40
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18340019
[Journal Article] Maximal surfaces with singularities in Mikowski space2006
- Author(s)
  M.Umehara, et al.
- Journal Title
  
  Hokkaido Math.J. 35
  
  Pages: 13-40
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Maximal surfaces with singularities in Mikowski space2006
- Author(s)
  Umehara, K. Yamada
- Journal Title
  
  Hokkaido Math. J. 35
  
  Pages: 13-40
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Maximal surfaces with singularities in Mikowski space2006
- Author(s)
  M.Umehara, K.Yamada
- Journal Title
  
  Hokkaido Math. J. 35
  
  Pages: 13-40
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Maximal surfaces with singularities in Minkowski space2006
- Author(s)
  Masaaki UMEHARA, Kotaro YAMADA et al.
- Journal Title
  
  Hokkaido Mathematical Journal (in press)
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] Singularities of flat fronts in hyperbolic 3-space2005
- Author(s)
  Masatoshi KOKUBU, Wayne ROSSMAN, Kentaro SAJI, Masaaki UMEHARA, Kotaro YAMADA
- Journal Title
  
  Pacific Journal of Mathematics volume 221 no.2
  
  Pages: 303-351
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] Singularities of flat fronts in hyperbolic 3-space2005
- Author(s)
  Masaaki UMEHARA, Kotaro YAMADA et al.
- Journal Title
  
  Pacific Journal of Mathematics (in press)
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] Symmetric CMC-1 surfaces with irregular ends2005
- Author(s)
  Wayne ROSSMAN, Masaaki UMEHARA, Kotaro YAMADA
- Journal Title
  
  Clay Mathematical Proceedings volume 2
  
  Pages: 561-584
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] Singularities of flat fronts in hyperbolic 3-space2005
- Author(s)
  Masaaki UMEHARA, Kotaro YAMADA et al.
- Journal Title
  
  Pacific Journal of Mathematics 221・2
  
  Pages: 303-351
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] Singularities of flat fronts in hyperbolic 3-space2005
- Author(s)
  M.Kokubu, W.Rossman, M.Umehara, K.Yamada
- Journal Title
  
  Pacific J. Math. 221
  
  Pages: 303-351
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Constructing mean curvature 1 surfaces in H^3 with irregular ends.2005
- Author(s)
  W.Rossmun, M.Umehara, K.Yamada
- Journal Title
  
  Global Theory of Minimal Surfaces (ed. D.Hoffman) Clay Mathematics Proceedings (A.M.S.) 2
  
  Pages: 561-584
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Singularites of flat fronts in hyperbolic 3-space2005
- Author(s)
  M.Kokubu, W.Rossmsan, K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Pacific J.Math. 221・(2)
  
  Pages: 303-351
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Maximal surfaus in Minkowski space2005
- Author(s)
  Masaaki UMEHARA, Kotaro YAMADA
- Journal Title
  
  Hokkaido Jounal of Mathematics (in press)
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] Flat fronts in hyperbolic 3-space2004
- Author(s)
  Masaaki UMEHARA, Kotaro YAMADA et al.
- Journal Title
  
  Pacific Journal of Mathematics 206-1
  
  Pages: 149-175
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] Flat fronts in hyperbolic 3-space2004
- Author(s)
  Masatoshi KOKUBU, Masaaki UMEHARA, Kotaro YAMADA
- Journal Title
  
  Pacific Journal of Mathematics volume 216, no.1
  
  Pages: 149-175
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] A global theory of flexes of periodic functions2004
- Author(s)
  G.Thorbergsson, M.Umehara
- Journal Title
  
  Nagoya Math. J. 173
  
  Pages: 85-138
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] An analogue of the UP-iteration for constant mean curvature one surfaces in Hyperbolic 3-space2004
- Author(s)
  C.McCune, M.Umehara
- Journal Title
  
  Diff. Geom. and its Appl. 20
  
  Pages: 197-207
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] A global Theory of flexes of periodic functions2004
- Author(s)
  Thorbergsson, Umehara
- Journal Title
  
  Nagoya Math.J. 173
  
  Pages: 85-138
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Flat fronts in hyperbolic 3-space2004
- Author(s)
  M.Kokubu, M.Umehara, K.Yamada
- Journal Title
  
  Pacific J. Math. 216
  
  Pages: 149-175
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Mean curvature 1 surfaces in hyperbolic 3-space with low total curvature2003
- Author(s)
  Wayne ROSSMAN, Masaaki UMEHARA, Kotaro YAMADA
- Journal Title
  
  Tohoku Mathematical Journal volume 55
  
  Pages: 375-395
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] Mean curoatuve 1 surfaces in hyperbolic 3-space with low total curuatnne2003
- Author(s)
  Masaaki UMEHARA, Kotaro YAMADA et al.
- Journal Title
  
  Tohoku Mathematical Journal 55
  
  Pages: 375-395
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] An elementary proof of small's formula for null canals in PSL(2.β)and an analogue for leqendrian curves in PSL(2.α)2003
- Author(s)
  Masaaki UMEHARA, Kotaro YAMADA et al.
- Journal Title
  
  Osaka Journal of Mathematical 40
  
  Pages: 681-715
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] An elementary proof of Small's formula for null curves in PSL(2,C) and an analogue for Legendrian curves in PSL(2,C)2003
- Author(s)
  Masatoshi KOKUBU, Masaaki UMEHARA, Kotaro YAMADA
- Journal Title
  
  Osaka Journal of Mathematics volume 55
  
  Pages: 375-395
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] An analogue of minimal surface theory in Sl(n,C))2002
- Author(s)
  M.Kokubu, M.Takahashi, M.Umehara, K.Yamada
- Journal Title
  
  Trans.Amer.Math.Soc. 354
  
  Pages: 1299-1325
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-14204004
[Journal Article] An analogue of minimal surface theory in Sl(n,C)2002
- Author(s)
  M.Kokubu, M.Takahashi, M.Umehara, K.Yamada
- Journal Title
  
  Trans.Amer.Math.Soc. 354
  
  Pages: 1299-1325
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-14204004
[Journal Article] An analogue of minimal surface theory in SL(2,C)/ SU(n)2002
- Author(s)
  Masatoshi KOKUBU, Masaro TAKAHASHI, Masaaki UMEHARA, Kotaro YAMADA
- Journal Title
  
  Transactions of the American Mathematical Society volume 354
  
  Pages: 1299-1325
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-14340024
[Journal Article] Behavior of corank one singular points on wave front
- Author(s)
  K. Saji, M. Umehara, K. Yamada
- Journal Title
  
  Kyushu Journal of Mathematics vol.62(1)
  
  Pages: 259-280
- NAID
  110006648027
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18340019
[Presentation] 流体力学的双対性を用いた時空の極大曲面に対する Bernstein 型の定理の拡張について2019
- Author(s)
  赤嶺新太郎，梅原雅顕，山田光太郎
- Organizer
  日本数学会2019年度年会（於：東京工業大学）
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] 3次元球面の平坦トーラスの外的直径について2019
- Author(s)
  梅原雅顕
- Organizer
  名城研究集会「多様体上の種々の幾何構造の融合」（於：名城大学）
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] Constant Mean Curvature Hypersurfaces with light-like points in Lorentzian manifolds2018
- Author(s)
  梅原雅顕
- Organizer
  Geometric shape generation （於：ウィーン工科大）
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] 時空の極大曲面とEuclid空間の極小曲面の流体力学的双対性とその応用2018
- Author(s)
  梅原雅顕
- Organizer
  部分多様体論・湯沢2018（於：湯沢グランドホテル）
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] 時空の平均曲率一定曲面上の光的な点における直線定理2018
- Author(s)
  梅原雅顕
- Organizer
  福岡大学微分幾何研究会
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] Maximal surfaces in Lorentz-Minkowski-space containing light-like lines2018
- Author(s)
  梅原　雅顕
- Organizer
  泉屋周一先生退職記念研究集会
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] Hypersurfaces with light-like points in Lorentzian manifolds2018
- Author(s)
  梅原雅顕
- Organizer
  15th International Workshop on Real and Complex Singularities（於：ブラジル，サンパウロ大学・サンカルロス校）
- Invited
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] Surfaces with light-like points in Lorentz-Minkowski 3-space2018
- Author(s)
  梅原　雅顕
- Organizer
  International workshop "Geometry of Submanifolds and Integrable System"
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] 特異点の微分幾何学「３次元時空の極大曲面をテーマにして」2017
- Author(s)
  梅原　雅顕
- Organizer
  日本応用数理学会2017年度年会・総合講演
- Invited
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] ３次元時空の極大曲面の解析的延長について2017
- Author(s)
  梅原　雅顕
- Organizer
  北海道大学・数学教室談話会
- Place of Presentation
  北海道大学
- Invited
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] 特異点をもつ曲面の幾何学2016
- Author(s)
  梅原　雅顕
- Organizer
  第63回幾何学シンポジウム
- Place of Presentation
  岡山大学・理学部
- Invited
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] 曲面の臍点の指数について2015
- Author(s)
  梅原雅顕
- Organizer
  福岡大学微分幾何研究会
- Place of Presentation
  福岡大学セミナーハウス
- Year and Date
  2015-11-01
- Invited
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] Indices of isolated umbilics on surfaces2015
- Author(s)
  梅原雅顕
- Organizer
  Geometric Analysis in Geometery and Topology 2015
- Place of Presentation
  東京理科大学・森戸記念館
- Year and Date
  2015-11-15
- Invited
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] 特異点をもつ曲面の等長変形について2014
- Author(s)
  梅原雅顕
- Organizer
  広島幾何学研究集会2014
- Place of Presentation
  広島大学理学部
- Year and Date
  2014-10-10
- Invited
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] 半正定値計量と曲面の特異点2014
- Author(s)
  梅原雅顕
- Organizer
  部分多様体論・湯沢2014
- Place of Presentation
  湯沢グランドホテル
- Year and Date
  2014-11-21
- Invited
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] Geometry of Surfaces with singularities2014
- Author(s)
  梅原雅顕
- Organizer
  微分幾何学国際研究集会Transformations and Singularities
- Place of Presentation
  ウィーン工科大学
- Year and Date
  2014-09-17
- Invited
- Data Source
  KAKENHI-PROJECT-26247005
[Presentation] 特異点をもつ曲面の微分幾何学2012
- Author(s)
  梅原雅顕
- Organizer
  日本数学会2012年度年会
- Place of Presentation
  トッパン・ホール(招待講演)
- Year and Date
  2012-03-27
- Data Source
  KAKENHI-PROJECT-22244006
[Presentation] 変曲点を持たない平面閉曲線について2011
- Author(s)
  梅原雅顕
- Organizer
  RIMS研究集会(部分多様体の微分幾何学的研究)
- Place of Presentation
  京都大学数理解析研究所(招待講演)
- Year and Date
  2011-06-27
- Data Source
  KAKENHI-PROJECT-22244006
[Presentation] 波面の幾何学-その内的双対性とGauss-Bonnetの定理への応用-2010
- Author(s)
  梅原雅顕
- Organizer
  日本数学会2010年度年会・企画特別講演
- Place of Presentation
  慶應義塾大学・理工学部
- Year and Date
  2010-03-26
- Data Source
  KAKENHI-PROJECT-19204005
[Presentation] 波面の幾何学-その内的双対性と Gauss-Bonnet の定理への応用-2010
- Author(s)
  梅原雅顕
- Organizer
  日本数学会2010年度年会・企画特別講演
- Place of Presentation
  慶應義塾大学・理工学部 (神奈川県)
- Year and Date
  2010-03-26
- Data Source
  KAKENHI-PROJECT-19204005
[Presentation] Differential Geometry of surfaces with singularities
- Author(s)
  梅原雅顕
- Organizer
  12th International Workshop on Real and Complex Singularities
- Place of Presentation
  サンパウロ大学サンカルロス校，ブラジル
- Invited
- Data Source
  KAKENHI-PROJECT-22244006
[Presentation] Zero Mean curvature surfaces in Lorentz-Minkowski 3-space which changes type across a light-like line
- Author(s)
  梅原雅顕
- Organizer
  Internatinal workshop on special Geometry and Minimal Subminifolds
- Place of Presentation
  東北大学・理学研究科
- Invited
- Data Source
  KAKENHI-PROJECT-22244006
[Presentation] 双曲計量と３次元de Sitter 空間の平均曲率１の曲面
- Author(s)
  梅原雅顕
- Organizer
  福岡大微分幾何研究会（Geometry and something)
- Place of Presentation
  福岡大学セミナーハウス
- Invited
- Data Source
  KAKENHI-PROJECT-22244006
[Presentation] 卵形線の縮閉線の形状と特異点
- Author(s)
  梅原雅顕
- Organizer
  福岡大学微分幾何研究会（Geometry or Something）
- Place of Presentation
  福岡大学セミナーハウス
- Invited
- Data Source
  KAKENHI-PROJECT-22244006
[Presentation] 特異点の内的不変量と等長変形
- Author(s)
  梅原雅顕
- Organizer
  山口幾何学研究集会2013 (進展する曲面論　－ Advances in Surface Theory )
- Place of Presentation
  山口大学理学部
- Invited
- Data Source
  KAKENHI-PROJECT-22244006
[Presentation] Differential Geometry of surfaces with singularities
- Author(s)
  梅原雅顕
- Organizer
  The 8th Geometry Conference for the Friendship of China and Japan
- Place of Presentation
  四川大学，中国
- Invited
- Data Source
  KAKENHI-PROJECT-22244006
[Presentation] ３次元時空の空間的極大曲面と、その時間的極小曲面への型変化について
- Author(s)
  梅原雅顕
- Organizer
  部分多様体論・湯沢2012
- Place of Presentation
  湯沢町・湯沢グランドホテル
- Invited
- Data Source
  KAKENHI-PROJECT-22244006
[Presentation] 交叉帽子の微分幾何学
- Author(s)
  梅原雅顕
- Organizer
  部分多様体と四元数構造 (RIMS研究集会)
- Place of Presentation
  京都大学数理解析研究所
- Invited
- Data Source
  KAKENHI-PROJECT-22244006

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98. NOMURA Takaaki (30135511)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
99. 高橋恒郎 (90015511)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
100. 田崎博之 (30179684)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
101. 中川久雄 (10015018)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
102. 竹内光弘 (00015950)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
103. 森田純 (20166416)

# of Collaborated Projects: 1 results

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104. 阿部英一 (30015507)

# of Collaborated Projects: 1 results

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105. 平峰豊 (30116173)

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106. 内田素夫 (10221805)

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107. 杉本充 (60196756)

# of Collaborated Projects: 1 results

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108. 新田貴士 (20202244)

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109. 小磯深幸 (10178189)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
110. 小池直之 (00281410)

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111. 斎藤義久 (20294522)

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112. 木村真琴 (30186332)

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113. 石田政司 (50349023)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
114. 小松玄 (60108446)

# of Collaborated Projects: 1 results

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115. 高橋雅朋 (80431302)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
116. HONDA Atsufumi

# of Collaborated Projects: 1 results

# of Collaborated Products: 3 results
117. HONDA Shouhei

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
118. 安藤直也

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
119. 山田泰彦

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
120. 森重文

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# of Collaborated Products: 1 results
121. 塩谷隆

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# of Collaborated Products: 1 results
122. Yang Hongcang

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results

UMEHARA MASAAKI 梅原 雅顕

UMEHARA Masaaki 梅原 雅顕

UMEHARA Masaki 梅原 雅串

梅原 雅顕 ウメハラ マサアキ

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Differential geometrey of singularities and its applicationsPrincipal Investigator

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Promotion of the study of curves, surfaces and hypersurfaces with singularities from the view point of differential geometryPrincipal Investigator

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Geometry of curves, surfaces and hypersurfaces with singularitiesPrincipal Investigator

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UMEHARA MASAAKI 梅原雅顕

UMEHARA Masaaki 梅原雅顕

UMEHARA Masaki 梅原雅串

梅原雅顕ウメハラマサアキ