SEKIGAWA Kouei 関川浩永

Researcher Number	60018661
Other IDs
Affiliation (based on the past Project Information) *help	2012: 新潟大学, 自然科学系, その他 2011 – 2012: 新潟大学, 自然科学系, フェロー 2010: 新潟大学, 自然科学系, 自然科学系フェロー 2009: 新潟大学, 自然科学系, フェロー 2005 – 2008: 新潟大学, 自然科学系, 教授 2001 – 2005: 新潟大学, 理学部, 教授 1986 – 1999: Dept. Math. Fac. Sci. Niigata University, 理学部, 教授
Review Section/Research Field	Principal Investigator Geometry / 代数学・幾何学 / Geometry Except Principal Investigator 解析学 / Geometry / 代数学・幾何学 / Geometry / General mathematics (including Probability theory/Statistical mathematics) / Algebra / Algebra
Keywords	Principal Investigator 概ケーラー多様体 / J-holomorphic curve / Einstein manifold / Goldberg予想 / 概複素構造 / アインシュタイン多様体 / Almost complex structure / Goldberg conjecture / 6次元球面 / 可解多様体 … More / Walker計量 / 概超複素多様体 / J-正則曲線 / 概複素多様体 / Integrability / Almost Kaehler manifold / (概)ケーラー多様体 / 積分可能性 / Kaehler manifold / Einstein metric / ケーラー多様体 / アインシュタイン計量 / 概エルミート構造 / aspherical多様体 / 調和写像 / Walker metric / Solvmanifold / 6-dimensional sphere / Weierstrass-Bryant公式 / 超極小J-正則曲線 / 概Hypercomplex(擬)エルミート多様体 / スカラー曲率 / Goldbergの予想 / Walker manifold / Six dimensional sphere / Benson-Gordon予想 / Solvable group / Blair-Ianus汎関数 / Spin(7) / CR-submanifold / Nearly Kahler 6-dimensional sphere / (Almost) Kahler manifold / Almost complex manifold / リッチ固有値 / 四元数構造 / Goldherg予想 / CR-部分多様体 / Nearlyケーラー6次元球面 / Hitchin-Thorpe type inequality / Cλ-manifold / Holomorphic sectional curvature / Weakly -Einstein manifold / Quasi Kaehler manifold / Maslou指数 / シンプレクティック構造 / C_L多様体 / (反)正則断面曲率 / (-)アインシュタイン多様体 / 概(擬)エルミート多様体 / C_l-多様体 / 弱-アインシュタイン多様体 / Hitchin-Thorpe型不等式 / Ce-多様体 / 正則断面曲率 / 弱^-アインシュタイン多様体 / Quasiケーラー多様体 / Hamiltonian / Gauge theory / Mean curvature / Spectrum / Harmonic mapping / Riemannian manifold / 量子力学 / ゲ-ジ理論 / スベクトラム / 球面定理 / 交叉コホモロジ- / リ-マン多様体 / ハミルトニアン / ゲージ理論 / 平均曲率 / スペクトラム / リーマン多様体 / 指数定理 / 2-stein多様体 / H-接触計量多様体 / TV-Bochner平坦概エルミート多様体 / TV-Bochner曲率テンソル / 接触計量多様体 / Chern-Weil理論 / 曲率恒等式 / Einstein計量 / Gauss-Bonnet定理 / 臨界概エルミート構造 / Gauss-Bonnet の定理 / 特性類 / Chern-Weil 理論 / 佐々木多様体 / Goldberg 予想 / Einstein 計量 / ボッホナー曲率テンンソル / 普遍曲率恒等式 / 単位接球面束 / アインシュタイン・ヒルベルト汎関数 / ガウス・ボンネ・チャーンの定理 / チャーン・ヴェイユ理論 / ゴールドバーグの予想 / 概エルミート多様体 / 楕円関数 / マルコフ決定過程 / 解析的接合積 / ラグランジアン力学系 / 失役点 / 曲率斉次空間 / アインシュタイン空間 / 情報幾何学 / 作用素環 / 極小曲面 / ホイヘンスの原理 / フィンスラー計量 / リーマン計量 / ダイナミック・ゲ-ム / Toeplitz作用素 / von Neumann algebra / ト-ラス作用 / 概ケ-ラ-多様体 … More Except Principal Investigator 作用素環 / 不変部分空間 / Riemannian geometry / MANIFOLD / 幾何学 / 測地線 / 平面凸ビリヤード / 測地線の幾何 / 測地線の幾何学 / 微分幾何学 / Nest環 / subdiagonal環 / ワープド積 / リッカチ微分方程式 / リーマン幾何学 / 作用素論 / 変換群 / 多目的数理計画理論 / Geometry / 多様体の社会学 / 超多様体 / 大成解析学 / 大域解析学 / NONLINEAR PARTIAL DIFFERENTIAL EQUATION / 非可換微分幾何 / 非線形偏微分方程式 / 多様体 / Kaehler structures / complex structures / homogeneous manifolds / 擬ケーラー構造 / 左不変複素構造 / 可解多様体 / ケーラー構造 / 複素構造 / 等質多様体 / invariant submanifolds / Grasmann geometry / J-holomorphic curves / Caley algebra / Exceptional Lie group / spin(7)-frame field / 8次元ユークリッド空間内の6次元部分多様体 / 不変部分多様体の変形理論 / super-minimalな概正則曲線 / 6次元球面の概複素構造 / 変形 / J-holomorphic curve / 6次元球面 / 部分多様体 / 概複素構造 / 不変部分多様体 / グラスマ幾何学 / 概正則曲線 / ケーリー代数 / 例外型単純リー群 / geometru of geodesics / 張り合わせ多様体 / リーマン多様体 / 凸ビリヤード問題 / congruent / pricipal curvature / orbit / Lie subgroup / strongly homogeneous / real hypersurface / cmplex space form / Be空間 / 分類 / 合同 / モデル空間 / 主曲率 / 軌道 / 等長変換群 / 実超曲面 / 複素空間型 / subdiagonal algebra / invariant subspace / function algebra / operator algebra / Subdiagonal環 / Hilbert module / 関数環 / theory of parallels / billiard / 平行線の幾何 / ビリヤード / リーマン幾何 / DIFFERENTIAL GEOMETRY / CONFORMAL STRUCTURE / Einstein-Weyl多様体 / 接触構造 / 自己双対計量 / 共形構造 / 微分多様体 / 定曲率空間 / スカラー曲率 / 概ケーラー空間 / リー群 / aspherical多様体 / 非可変微分幾何学 / 情報理論 / 解析的部分環 / 自己同型群 / 分岐因子 / very ample diviosr / Galois closure surface / モノドロミー群 / 最小ガロワ閉包多様体 / 双有理変換 / 分岐被覆 / ガロワ埋め込み / ガロワ点 / K3曲面 / ガロワ群 / ガロワ被覆 / 代数幾何学 / 大域幾何 / 曲率 / 球面のシュタイナー比 / 平面のシュタイナー比 / ギルバート・ポラックの予想 / トポノゴフの比較定理 / 放射曲率 / 回転面 / 平行線 / 円 / アレキサンドルフ幾何 / 曲面 / 最短ネットワーク / 平行線の理論 / 平面凸ビリヤード問題 / シュタイナー比 / 最短ネットワーク問題 / ヘシアン / 勾配流 / 分解定理 / ヤコビ場 / ベクトル場 / レビ問題 / ケーラー多様体 / BKW-作用素 / ブラシュケ積 / 極大イデアル空間 / ブルゲン環 / 有理関数体 / 超楕円曲面 / アーベル曲面 / 非有理次数 / 最適解 / 最適化理論 / 解析的接合積 / 作用素 / 密度関数 / 非可換Lpー空間 / m人ゲーム / 力学系 / 等質空間 / テプリッツ作用素 / イオン・ノイマン代数 / 非有界微分子 / Harkel作用素 / Toeplitz作用素 / 非可換Hardy空間 / 散乱理論 / アスフェリカル多様体 / リ-群 / CRー構造 / 関数方程式論 / 曲面論 / 凸解析理論 / 確率論 / ゲ-ム理論 Less

Almost Hermitian geometry and the related topicsPrincipal Investigator
- Principal Investigator
  
  SEKIGAWA Kouei
- Project Period (FY)
  2010 – 2012
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Niigata University
Study on the Galois embeddings of K3 surfaces
- Principal Investigator
  
  YOSHIHARA Hisao
- Project Period (FY)
  2007 – 2008
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Niigata University
Geometry of geodesics for minimal network problems and plane convex billiards
- Principal Investigator
  
  INNAMI Nobuhiro
- Project Period (FY)
  2006 – 2009
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Niigata University
Astudy on complex and Kaehler structures on compact homogeneous manifolds
- Principal Investigator
  
  HASEGAWA Keizo
- Project Period (FY)
  2006 – 2007
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Niigata University
Study of topis related to almost complex structuresPrincipal Investigator
- Principal Investigator
  
  SEKGAWA Kouei
- Project Period (FY)
  2004 – 2006
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Niigata University
Various geometric structures and Grassmann Geometry
- Principal Investigator
  
  HASHIMOTO Hideya
- Project Period (FY)
  2003 – 2005
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Meijo University
Geometry of Almost Complex ManifoldsPrincipal Investigator
- Principal Investigator
  
  SEKIGAWA Kouei
- Project Period (FY)
  2002 – 2003
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  NIIGATA UNIVERSITY
A study on submanifolds in a complex projective space
- Principal Investigator
  
  TAKAGI Ryoichi
- Project Period (FY)
  2001 – 2002
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Chiba University
Studies of glued Riemannian manifolds
- Principal Investigator
  
  INNAMI Nobuhiro
- Project Period (FY)
  2001 – 2004
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Niigata University
Geometry of Almost Hermitian ManifoldsPrincipal Investigator
- Principal Investigator
  
  SEKIGAWA Kouei
- Project Period (FY)
  1998 – 1999
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  NIIGATA UNIVERSITY
Researches on vector fields in the large by Riccati equation
- Principal Investigator
  
  INNAMI Nobuhiro
- Project Period (FY)
  1997 – 1999
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Niigata University
The structure of Hilbert modules over operator algebras and its application
- Principal Investigator
  
  SAITO Kichi-suke
- Project Period (FY)
  1997 – 1998
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Niigata University
ヤコビベクトル場による大域幾何学の研究
- Principal Investigator
  
  印南信宏
- Project Period (FY)
  1996
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Niigata University
作用素環の手法による作用素と不変部分空間の研究
- Principal Investigator
  
  斎藤吉助
- Project Period (FY)
  1996
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Niigata University
Global Analysis of Manifolds and Conformal Structures
- Principal Investigator
  
  ITOH Mitsuhiro
- Project Period (FY)
  1996 – 1997
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geometry
- Research Institution
  UNIVERSITY OF TSUKUBA
代数曲面の非有理次数の研究
- Principal Investigator
  
  YOSHIHARA Hisao
- Project Period (FY)
  1995
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Niigata University
トーラス上の不変部分空間の構造
- Principal Investigator
  
  泉池敬司
- Project Period (FY)
  1995
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Niigata University
微分可能多様体上の幾何学的諸構造に関する研究Principal Investigator
- Principal Investigator
  
  関川浩永
- Project Period (FY)
  1994
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Niigata University
作用素環の手法による作用素の構造の研究とその応用
- Principal Investigator
  
  斎藤吉助
- Project Period (FY)
  1993
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Niigata University
最適化基礎理論の数学的手法による研究
- Principal Investigator
  
  田中謙輔
- Project Period (FY)
  1993
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  General mathematics (including Probability theory/Statistical mathematics)
- Research Institution
  Niigata University
多様体上の幾何学的諸構造に関する研究Principal Investigator
- Principal Investigator
  
  関川浩永
- Project Period (FY)
  1992
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  代数学・幾何学
- Research Institution
  Niigata University
CR構造の局所埋め込み問題について
- Principal Investigator
  
  渡辺誠治
- Project Period (FY)
  1992
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Niigata University
多様体の幾何学
- Principal Investigator
  
  渡部剛
- Project Period (FY)
  1991
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  代数学・幾何学
- Research Institution
  Niigata University
作用素環における散乱理論の研究とその応用
- Principal Investigator
  
  斎藤吉助
- Project Period (FY)
  1991
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Niigata University
GEOMETRY OF MANIFOLDS AND RELATED SUBJECTSPrincipal Investigator
- Principal Investigator
  
  SEKIGAWA Kouei
- Project Period (FY)
  1991 – 1992
- Research Category
  
  Grant-in-Aid for Co-operative Research (A)
- Research Field
  
  代数学・幾何学
- Research Institution
  NIIGATA UNIVERSITY
ゲ-ム理論の数学的手法による研究
- Principal Investigator
  
  田中謙輔
- Project Period (FY)
  1990
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  General mathematics (including Probability theory/Statistical mathematics)
- Research Institution
  Niigata University
CR構造の局所埋め込み問題について
- Principal Investigator
  
  赤堀隆夫
- Project Period (FY)
  1990
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Niigata University
微分可能多様体上の幾何学Principal Investigator
- Principal Investigator
  
  関川浩永
- Project Period (FY)
  1989
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  代数学・幾何学
- Research Institution
  Niigata University
多様体の幾何学
- Principal Investigator
  
  渡部剛
- Project Period (FY)
  1988
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  代数学・幾何学
- Research Institution
  Niigata University
作用素環上の自己同型群の構造とその応用
- Principal Investigator
  
  斎藤吉助
- Project Period (FY)
  1987
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Niigata University
Geometry on smooth manifolds
- Principal Investigator
  
  KITAHARA Haruo
- Project Period (FY)
  1986 – 1987
- Research Category
  
  Grant-in-Aid for Co-operative Research (A)
- Research Field
  
  代数学・幾何学
- Research Institution
  Kanazawa University
Mathematical Geometry
- Principal Investigator
  
  OMORI Hideki
- Project Period (FY)
  1985 – 1986
- Research Category
  
  Grant-in-Aid for Co-operative Research (A)
- Research Field
  
  代数学・幾何学
- Research Institution
  Science University of Tokyo

All 2013 2012 2011 2010 2009 2008 2007 2006 2004 2003 2002 Other

All Journal Article Presentation

[Journal Article] Transplanting geometrical structures2013
- Author(s)
  Y.Euh,P.Gilkey,J.H.Park,K.Sekigawa
- Journal Title
  
  Diff.Geom.Appl
  
  Volume: 31 Pages: 374-387
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] Orthogonal almost complex structures onThe Riemannian products ofeven-dimensional round spheres2013
- Author(s)
  Y.Euh, K.Sekigawa
- Journal Title
  
  J.Korean Math.Soc
  
  Volume: 50 Issue: 2 Pages: 231-240
- DOI
  10.4134/jkms.2013.50.2.231
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] Some critical almost Hermitian structures2013
- Author(s)
  J.C.Lee,J.H.Park,K.Sekigawa
- Journal Title
  
  Results. Math
  
  Volume: 63 Issue: 1-2 Pages: 31-45
- DOI
  10.1007/s00025-011-0143-8
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] A curvature identity on a 4-dimensionalRiemannian manifold2013
- Author(s)
  Y.Euh, J.H.Park, K.Sekigawa
- Journal Title
  
  Results. Math
  
  Volume: 63 Issue: 1-2 Pages: 107-114
- DOI
  10.1007/s00025-011-0164-3
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] Universal curvature identities2012
- Author(s)
  P.Gilkey, J.H.Park, K.Sekigawa
- Journal Title
  
  J.Geom. Phys
  
  Volume: 62 Issue: 4 Pages: 814-825
- DOI
  10.1016/j.geomphys.2012.01.002
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] Hermitian structures on the product of Sasakian manifolds2012
- Author(s)
  J.C.Lee, J.H.Park, K.Sekigawa
- Journal Title
  
  Geometriae Dedicata
  
  Volume: 161 Issue: 1 Pages: 399-408
- DOI
  10.1007/s10711-012-9711-7
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] Notes on some classes of 3-dimensional Contact metricmanifolds2012
- Author(s)
  J.E.Jin, J.H.Park, K.Sekigawa
- Journal Title
  
  Balkan J. Geom. Appl
  
  Volume: 17 Pages: 54-65
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] Critical metrics for quadratic functionals In the curvature on 4-dimensional Manifolds2011
- Author(s)
  Y.Euh, J.H.Park, K.Sekigawa
- Journal Title
  
  Diff. Geom. Appl
  
  Volume: 29 Issue: 5 Pages: 642-646
- DOI
  10.1016/j.difgeo.2011.07.001
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] H-contact unit tangent sphere bundles of four-dimensional Riemannian manifolds2011
- Author(s)
  S.H.Chun, J.H.Park, K.Sekigawa
- Journal Title
  
  J. Aust. Math. Soc
  
  Volume: 91 Issue: 2 Pages: 243-256
- DOI
  10.1017/s1446788711001388
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] Nootes on strictly nearly Kaehler Einstein manifolds2011
- Author(s)
  Y.Euh, K.Sekigawa
- Journal Title
  
  Compt. Rend. de Acad. Sci
  
  Volume: 64 Pages: 791-798
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] H-contact unit tangent sphere bundles of Einstein manifolds2011
- Author(s)
  S.H.Chun, J.H.Park, K.Sekigawa
- Journal Title
  
  Q. J. Math
  
  Volume: 62 Issue: 1 Pages: 59-69
- DOI
  10.1093/qmath/hap025
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] Almost Hermitian surfaces With vanishing Tricerri-Vanhecke Bochner curvature tensor2011
- Author(s)
  Y.Euh,J.C.Lee,J.H.Park,K.Sekigawa, A.Yamada
- Journal Title
  
  Colloq.Math
  
  Volume: 122 Issue: 1 Pages: 33-53
- DOI
  10.4064/cm122-1-4
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] Universal curvature identities2011
- Author(s)
  P.Kilkey, J.H.Park, K.Sekigawa
- Journal Title
  
  Diff. Geom. Appl
  
  Volume: 29 Issue: 6 Pages: 770-778
- DOI
  10.1016/j.difgeo.2011.08.005
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] Notes on critical almost Hermitian Structures2010
- Author(s)
  J.C.Lee, J.H.Park, K.Sekigawa
- Journal Title
  
  Bull. Korean Math. Soc
  
  Volume: 47 Issue: 1 Pages: 167-178
- DOI
  10.4134/bkms.2010.47.1.167
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540071
[Journal Article] Nearly Ka"hler manifolds with vanishing Tricerri-Vanhecke Bochner curvature tensor2009
- Author(s)
  Euh Y., Park J. H, Sekigawa K
- Journal Title
  
  Differential Geom 27,no.2
  
  Pages: 250-256
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540076
[Journal Article] When are the tangent sphere bundles of a Riemannian manifoldη-Einstein?2009
- Author(s)
  Park J. H, ; Sekigawa K
- Journal Title
  
  Ann. Global Anal. Geom 36,no.3
  
  Pages: 275-284
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540076
[Journal Article] η-Einstein tangent sphere bundles of constant radii2009
- Author(s)
  Chun Sun Hyang, Park Jeong Hyeong, Sekigawa Kouei
- Journal Title
  
  Int. J. Geom. Methods Mod. Phys 6,no.6
  
  Pages: 965-984
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540076
[Journal Article] Some critical almost Ka"hler structures2008
- Author(s)
  Oguro Takashi, Sekigawa Kouei
- Journal Title
  
  Colloq. Math 111,no.2
  
  Pages: 205-212
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540076
[Journal Article] Compact indefinite almost Ka"hler Einstein manifolds2008
- Author(s)
  Sekigawa Kouei, Yamada Akira
- Journal Title
  
  Geom. Dedicata 132
  
  Pages: 65-79
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540076
[Journal Article] A remark on an example of a 6-dimensional Einstein almost-Ka"hler manifold2008
- Author(s)
  Hirobe Keiichiro, Oguro Takashi, Sekigawa, Kouei
- Journal Title
  
  J. Geom 88,no.1-2
  
  Pages: 70-74
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540076
[Journal Article] Remarks onη-Einstein unit tangent bundles2008
- Author(s)
  Chai Y.D., Chun S.H., Park J.H., Sekigawa K
- Journal Title
  
  Monatsh. Math 155,no.1
  
  Pages: 31-42
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540076
[Journal Article] Compact indefinite almost Kahler Einstein manifolds2008
- Author(s)
  K. Sekigawa and A. Yamada
- Journal Title
  
  Geom. Dedicata vol.132
  
  Pages: 65-79
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19540016
[Journal Article] Compact indefinite almost Kaehler Einstein manifolds2008
- Author(s)
  K. Sekigawa and A. Yamada (関川浩永, 山田章)
- Journal Title
  
  Geometriae Dedicata Vol.132
  
  Pages: 65-79
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540075
[Journal Article] Some critical almost Kahler structures2008
- Author(s)
  T. Oguro and K. Sekigawa
- Journal Title
  
  Colloq. Math Vol.111
  
  Pages: 205-212
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19540016
[Journal Article] Compact indefinite almost Kaehler Einstein manifolds2008
- Author(s)
  K. Sekigawa and A. Yamada(関川浩永, 山田章)
- Journal Title
  
  Geometriae Dedicata Vol.132
  
  Pages: 65-79
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540075
[Journal Article] Compact indefinite almost Kaehler Einstein manifolds2008
- Author(s)
  K, Sekigawa, A. Yamada
- Journal Title
  
  Geometriae Dedicata Vol.132
  
  Pages: 65-79
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-18540075
[Journal Article] Remarks on four-dimensional Tricerri-Vanhecke Bochner flat almost Hermitian manifolds2007
- Author(s)
  Lee J., Park J.H., Sekigawa K
- Journal Title
  
  Honam Math. J 29,no.4
  
  Pages: 681-694
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540076
[Journal Article] Extrinsic homogeneous almost Hermitian 6-dimensional submanifolds in the octonions2007
- Author(s)
  Hashimoto Hideya, Koda Takashi, Mashimo Katsuya, Sekigawa, Kouei
- Journal Title
  
  Kodai Math. J 30,no.3
  
  Pages: 297-321
- NAID
  130004496108
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540076
[Journal Article] Remarks on four-dimensional Tricerri-Vanhecke Bochner flat almost Hermitian manifolds2007
- Author(s)
  J. Lee, J. Park and K. Sekigawa
- Journal Title
  
  Honam Math., J vol.29
  
  Pages: 681-694
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19540016
[Journal Article] Extrinsic homogeneous almost Hermitian 6-dimensional submanifolds in the octonions2007
- Author(s)
  H. Hashimoto, T. Koda, K. Mashimo and K. Sekigawa
- Journal Title
  
  Kodai Math. J vol.30
  
  Pages: 297-321
- NAID
  130004496108
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19540016
[Journal Article] A note on the integrability of a class of almost quaternionic manifolds2006
- Author(s)
  K.Sekigawa
- Journal Title
  
  Indian Math. J. 48・2
  
  Pages: 239-248
- Data Source
  KAKENHI-PROJECT-16540057
[Journal Article] A note on the integrability of a class of almost quaternionic manifolds2006
- Author(s)
  Kouei Sekigawa
- Journal Title
  
  Indian Journal of Mathematics 48・2
  
  Pages: 239-248
- Data Source
  KAKENHI-PROJECT-18540076
[Journal Article] A note on the integrability of a class of almost quaternionic manifolds,2006
- Author(s)
  K. Sekigawa and A. Yamada(関川浩永, 山田章)
- Journal Title
  
  Indian Journal of Mathematics Vol.48
  
  Pages: 239-248
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540075
[Journal Article] A note on the integrability of a class of almost quaternionic manifolds2006
- Author(s)
  K, Sekigawa, A. Yamada
- Journal Title
  
  Indian Journal of Mathematics Vol.48
  
  Pages: 239-248
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-18540075
[Journal Article] A note on the integrability of a almost quanterinionic manifolds2006
- Author(s)
  関川浩永(共著)
- Journal Title
  
  Indian Journal of Mathematics 48
  
  Pages: 239-248
- Data Source
  KAKENHI-PROJECT-18540075
[Journal Article] Submanifolds of a nearly kahler 6-dimensional sphere,2004
- Author(s)
  橋本英哉, 関川浩永
- Journal Title
  
  Proceedings of the Eighth International Workshop on Differential Geometry,
  
  Pages: 23-45
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15540099
[Journal Article] Notes on strictly almost Kaehler Einstein manifolds of dimension four.2004
- Author(s)
  Sekigawa Kouei
- Journal Title
  
  Yokohama Math J. Vol.51
  
  Pages: 19-27
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15540099
[Journal Article] Submanifolds of a nearly Kaehler 6-dimensional sphere.2004
- Author(s)
  Hashimoto Hideya, Sekigawa Kouei
- Journal Title
  
  Proceedings of the eighth International Work shop in Differential geometry
  
  Pages: 23-45
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15540099
[Journal Article] Notes on strictly almost Kahler Einstein manifolds of dimension four2004
- Author(s)
  T.Oguro, K.Sekigawa
- Journal Title
  
  Yokohama Math.J. 51
  
  Pages: 19-27
- NAID
  120001740816
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-13640068
[Journal Article] Submanifolds of a nearly Kahler 6-dimensional sphere2004
- Author(s)
  Hideya Hashimmoto, Kouei Sekigawa
- Journal Title
  
  Proceedings of the eighth International workshop on differential geometry 8
  
  Pages: 23-45
- Data Source
  KAKENHI-PROJECT-15540099
[Journal Article] Notes on strictly almost K"aler Einstein manifolds of dimension four,2004
- Author(s)
  関川浩永
- Journal Title
  
  Yokohama Math.J., 51
  
  Pages: 19-27
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15540099
[Journal Article] Notes on Kahler surfaces with distinct constant Ricci eigenvalues2003
- Author(s)
  T.Nihonyanagi T.Oguro, K.Sekigawa
- Journal Title
  
  J.Korean Math.Soc. 40
  
  Pages: 1015-1029
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-13640068
[Journal Article] On 4-dimensional CR-submanifolds of a 6-dimensional sphere. Minimal surfaces2002
- Author(s)
  H.Hashimoto, K.Mashimo, K.Sekigawa
- Journal Title
  
  Adv.Studies in Pure Math. 34
  
  Pages: 143-154
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-13640068
[Journal Article] A note on the integrability of a class of almost quaternionic manifolds
- Author(s)
  K.Sekigawa, A.Yamada
- Journal Title
  
  Indian Journal of mathemayics 48(2006)
  
  Pages: 239-248
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16540057
[Journal Article] A remark on an example of A 6-dimensional Einstein almost Kaehler manifold
- Author(s)
  K.Hirobe, T.Oguro, K.Sekigawa
- Journal Title
  
  Journal of Geometry (in printing)
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16540057
[Journal Article] A remark on an example of a 6-dimensional almost Keahler-Einstein manifolds
- Author(s)
  関川浩永(共著)
- Journal Title
  
  Journal of Geometry (印刷中)
- Data Source
  KAKENHI-PROJECT-18540075
[Presentation] 4次元リーマン多様体の普遍曲率恒等式2012
- Author(s)
  関川浩永
- Organizer
  第6回数物研究会
- Place of Presentation
  富山県民会館
- Year and Date
  2012-09-13
- Data Source
  KAKENHI-PROJECT-22540071
[Presentation] Some critical almost Hermitian structures and examples2010
- Author(s)
  関川浩永
- Organizer
  Intrnational workshop on complex structures,integrability and vector fields
- Place of Presentation
  ソフィア(ブルガリア)
- Year and Date
  2010-09-15
- Data Source
  KAKENHI-PROJECT-22540071
[Presentation] A curvature identity on a 4-dimensional Riemannian manifold2010
- Author(s)
  関川浩永
- Organizer
  International Workshop on Differential Geometry
- Place of Presentation
  成均館大学校(韓国)
- Year and Date
  2010-06-25
- Data Source
  KAKENHI-PROJECT-22540071
[Presentation] Acurvature identity on a 4-〔limensional Riemannian manifold and its applications2010
- Author(s)
  関川浩永
- Organizer
  Conference in Geometry and Global Analysis
- Place of Presentation
  スペイン,サンチャゴ・デ・コンポステラ
- Year and Date
  2010-12-13
- Data Source
  KAKENHI-PROJECT-22540071
[Presentation] 臨界概エルミート構造について2010
- Author(s)
  関川浩永
- Organizer
  放送大学秋田学習センター
- Year and Date
  2010-11-18
- Data Source
  KAKENHI-PROJECT-22540071
[Presentation] A curvature identity ona 4-dimensional Riemannianmanifold and its applications2010
- Author(s)
  関川浩永
- Organizer
  Conference in Geometryand Global Analysis
- Place of Presentation
  サンティアゴ・デ・コンポステラ(スペイン)
- Year and Date
  2010-12-13
- Data Source
  KAKENHI-PROJECT-22540071
[Presentation] On η-Einstein tangent sphere bundles2008
- Author(s)
  関川浩永
- Organizer
  新潟微分幾何学研究集会
- Place of Presentation
  新潟大学自然科学研究科
- Year and Date
  2008-11-06
- Data Source
  KAKENHI-PROJECT-19540016
[Presentation] 4次元リーマン多様体の普遍曲率恒等式
- Author(s)
  関川　浩永
- Organizer
  第6回数物研究会
- Place of Presentation
  富山県民会館508会議室
- Data Source
  KAKENHI-PROJECT-22540071

1. SAITO Kichi-suke (30018949)

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2. TANAKA Kensuke (70018258)

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SEKIGAWA Kouei 関川 浩永

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Almost Hermitian geometry and the related topicsPrincipal Investigator

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Study of topis related to almost complex structuresPrincipal Investigator

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Geometry of Almost Complex ManifoldsPrincipal Investigator

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Geometry of Almost Hermitian ManifoldsPrincipal Investigator

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SEKIGAWA Kouei 関川浩永