Ohtsuka Fumiko 大塚富美子

… Alternative Names

OHTSUKA Fumiko 大塚富美子

大塚冨美子オオツカフミコ

松久富美子マツヒサフミコ

大塚富美子

Less

Researcher Number	90194208
Other IDs
Affiliation (Current)	2025: 茨城大学, 基礎自然科学野, 准教授
Affiliation (based on the past Project Information) *help	2018 – 2023: 茨城大学, 理工学研究科(理学野), 准教授 2012 – 2017: 茨城大学, 理学部, 准教授 2007 – 2008: Ibaraki University, 理学部, 准教授 1996 – 2006: 茨城大学, 理学部, 助教授 1996: 茨城大学理学部, 助教授 … More 1993: 茨城大学, 理学部, 助手 1991: 茨城大学, 理学部, 助手 1988: 茨城大学, 理学部, 助手 Less
Review Section/Research Field	Principal Investigator Geometry / Geometry Except Principal Investigator Geometry / Geometry / 解析学 / Algebra / Basic Section 11020:Geometry-related / Global analysis / 代数学・幾何学
Keywords	Principal Investigator 全曲率 / 定曲率 / 多面体 / Tits metric / constant curvature / total curvature / polyhedron / 平坦な多面体 / piecewise Riemannian manifolds / 理想境界 … More / 測地線 / piecewise Riemannian manifold / piecewise Riemannian polyhedron / Housdorff approzimation / Housdorff convergence / ideal boundary … More Except Principal Investigator hypersurface / normal crossing / monoidal transformation / blowing-up / positive characteristic / resolution / singularity / Kaehler magnetic fields / Kaehler immersion / complex space form / length spectrum / 複素双曲空間 / ツイスター空間 / 四元数ケーラー構造 / 実超曲面 / 部分多様体 / magnetic flow / comparison theorem / sectors / magnetic exponential maps / Jacobi fields / trajectories / crescent / polynomial / homotopy / サメルソン積 / ホモトピー群 / 回転群SO(4) / H空間 / Chow環 / ホモトピー / 自己写像 / リー群 / geodesic sphere / Kaehler magnetic field / helix / circle / 無限遠点 / 曲率 / リッチ・ソリトン / ルジャンドル部分多様体 / 複素射影空間 / 複素グラスマン多様体 / ホップ超曲面 / ガウス写像 / 固有値漸近分布 / パウリ作用素 / 指数積公式 / 非一様磁場 / 四元数対称空間 / 複素2平面グラスマン多様体 / 法線叢 / 複素２平面グラスマン多様体 / ラグランジュ部分多様体 / 構造捩率 / 葉層構造 / 軌道の外的形状 / Ａ型実超曲面 / 佐々木磁場 / 円 / 極小超曲面 / ハープ・セクター / 理想境界 / 軌道ホルン / 比較定理 / ケーラー磁場 / 軌道ハープ / ideal boundaries / trajectory-harps / Hadamard manifolds / グラスマン多様体 / 線織面 / スカラー曲率 / φ-断面曲率 / パラ四元数ケーラー構造 / nilpotency class of groups / localization / Samelson product / H-map / H-space / Lie grop / モチビックコホモロジー / Brown-Petersonコホモロジー / 代数的サイクル / 自己ホモトピー同値写像 / コンパクトリー群 / 回転群 / 例外リー群 / サルメソン積 / 群のべき零指数 / 局所化 / H-写像 / H-空間 / 自己写像ホモトピー類集合 / curvature-adapted / Veronese embedding / Jacobi field / variation of geodesics / bow shape / magnetic Jacobi fields / trajectory / power series / normal crosing / duality / bimodule / Frobenius algebra / Hopf algebras / orbifold / tensor categories / 分岐則代数 / 平面代数 / スペクトル流 / 自由積 / 五角形方程式 / 双対性 / 双加群 / フロベニウス代数 / ホップ代数 / 軌道体 / テンソル圏 / acute triangulation / tightness / cut locus / total curvature / curvature / polyhedron / 体積公式 / voronoi領域 / 最遠点 / 鋭角三角形分割 / tight性 / 最小跡 / 全曲率 / 多面体 / Chow ring / extraspecial p-group / rank / Hopf space / nilpotency class / self map / Lie group / 交換子 / 冪零指数 / コホモロジー作用素 / 巾零指数 / 階数 / Moore空間 / extraspecial p-群 / ランク / ホップ空間 / べき零指数 / shperical mean / geodesis sphere / closed geodesic / kahler magnetic field / curve of order 2 / Veronese emmbeding / kaehler immersion / spherical mean / geodsic sphere / kaehler magnetic field / Weier strass theorem / ニュートン多面体 / 例外因子 / 正規交差 / 正標数 / ブローアップ / 特異点 / Weierstrass theorem / scattering amplitudes / scattering by magnetic fields / asymptotic distribution of eigenvalues / Pauli operator / Schrodinger semigroup / exponential product formula / 固有値分布 / レゾルベント / 散乱振幅 / 磁場散乱 / シュレディンガー半群 / 調和関数 / 境界挙動 / ポテンシャル論 / イデアル / 環 / ガロア理論 / 半群 / 代数的数体 / 関数方程式 / リーマン多様体 / 特殊ラグランジュ部分多様体 / Austere 超曲面 / Hopf 超曲面 / 全複素部分多様体 / 外的測地線 / Austere 部分多様体 / 重み付きソボレフ不等式 / 重み付きソボレフの埋め込み定理 / 退化楕円型方程式 / ギップス半群 / 分配関数 / 散乱断面積 / シュレ-ディンガー作用素 / 相対容量 / ポテンシャル / Schrodinger / Toeplitz作用素 / エントロピ- / 代作用代数 / 作用素 Less

Submanifold theory related to the twistor space of quaternionic symmetric spaces
- Principal Investigator
  
  木村真琴
- Project Period (FY)
  2020 – 2024
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 11020:Geometry-related
- Research Institution
  Ibaraki University
Twistor theory in Submanifold geometry
- Principal Investigator
  
  Kimura Makoto
- Project Period (FY)
  2016 – 2020
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Ibaraki University
Research of Ricci soliton in terms of Submanifold theory
- Principal Investigator
  
  Kimura Makoto
- Project Period (FY)
  2012 – 2016
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Ibaraki University
Ideal boundary of a Hadamard manifold and Kaehler magnetic fields
- Principal Investigator
  
  ADACHI Toshiaki
- Project Period (FY)
  2012 – 2016
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Nagoya Institute of Technology
Research on the structure of polyhedra from the viewpoint of total curvaturePrincipal Investigator
- Principal Investigator
  
  OHTSUKA Fumiko
- Project Period (FY)
  2005 – 2008
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Ibaraki University
Study of algebraic structures on homotopy sets
- Principal Investigator
  
  OSHIMA Hideaki
- Project Period (FY)
  2003 – 2005
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Ibaraki University
Theory of resolution of singularities in positive characteristic
- Principal Investigator
  
  URABE Tohsuke
- Project Period (FY)
  2002 – 2004
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Ibaraki University
Comparison on bow-shapes for Kaehler magnetic fields
- Principal Investigator
  
  ADACHI Toshiaki
- Project Period (FY)
  2002 – 2004
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Nagoya Institute of Technology
Research on the structure of ideal boundaries of piecewise Riemannian polyhedra from the viewpoint of total curvaturePrincipal Investigator
- Principal Investigator
  
  OHTSUKA Fumiko
- Project Period (FY)
  2001 – 2004
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Ibaraki University
Homotopical properties of Lie groups and related spaces
- Principal Investigator
  
  OSHIMA Hideaki
- Project Period (FY)
  2000 – 2002
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Ibaraki University
Geometry of polyhedron from the view point of differential geometry
- Principal Investigator
  
  ITOH Jin-ichi
- Project Period (FY)
  2000 – 2001
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Kumamoto University
Quantum symmetry in tensor categories
- Principal Investigator
  
  YAMAGAMI Shigeru
- Project Period (FY)
  2000 – 2002
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Global analysis
- Research Institution
  IBARAKI UNIVERSITY
Toward the theory of resolution of singularities in positive characteristic
- Principal Investigator
  
  URABE Tohsuke
- Project Period (FY)
  1999 – 2000
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  IBARAKI UNIVERSITY
Kaeler magnetic fields and Carnot spaces
- Principal Investigator
  
  ADACHI Toshiaki
- Project Period (FY)
  1999 – 2001
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Nagoya Institute of Technology
多様体の大域的な幾何学構造の特徴付けに関する研究Principal Investigator
- Principal Investigator
  
  松久富美子
- Project Period (FY)
  1998 – 1999
- Research Category
  
  Grant-in-Aid for Encouragement of Young Scientists (A)
- Research Field
  
  Geometry
- Research Institution
  Ibaraki University
Spectral and Scattering Theory and its Application
- Principal Investigator
  
  TAMURA Hideo
- Project Period (FY)
  1997 – 1998
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Okayama University
  Ibaraki University
シュレ-ディンガー作用素のスペクトル理論とその応用
- Principal Investigator
  
  田村英男
- Project Period (FY)
  1996
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Ibaraki University
退化楕円型方程式の解の構造の研究
- Principal Investigator
  
  堀内利郎
- Project Period (FY)
  1996
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Ibaraki University
完備・非コンパクトリーマン多様体の特徴付けに関する研究Principal Investigator
- Principal Investigator
  
  松久富美子
- Project Period (FY)
  1993
- Research Category
  
  Grant-in-Aid for Encouragement of Young Scientists (A)
- Research Field
  
  Geometry
- Research Institution
  Ibaraki University
作用素解析と作用素代数の研究
- Principal Investigator
  
  HIAI Fumio
- Project Period (FY)
  1991
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Ibaraki University
環論とその応用の研究
- Principal Investigator
  
  松田隆輝
- Project Period (FY)
  1988
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  代数学・幾何学
- Research Institution
  Ibaraki University

All 2017 2005 2004 2001 Other

All Journal Article

[Journal Article] Classification of regular complex 2-polyhedra of positive constant excess2017
- Author(s)
  Jin-ichi Itoh, Fumiko Ohtsuka
- Journal Title
  
  Topology and its applications
  
  Volume: 219 Pages: 43-54
- DOI
  10.1016/j.topol.2017.01.004
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-25240004, KAKENHI-PROJECT-26400072, KAKENHI-PROJECT-15KT0020, KAKENHI-PROJECT-16K05119, KAKENHI-PROJECT-16K05258, KAKENHI-PROJECT-26400071
[Journal Article] Total curvature of noncompact piecewise Rieman 2-Polyhedra2005
- Author(s)
  J.Itoh, F.Ohtsuka
- Journal Title
  
  Tsukuba J.Math 29
  
  Pages: 471-493
- Data Source
  KAKENHI-PROJECT-17540060
[Journal Article] Total curvature of noncompact piecewise Riemannian 2-polyhedra2005
- Author(s)
  J. Itoh and F. Ohtsuka
- Journal Title
  
  Tsukuba J. Math. 29
  
  Pages: 471-493
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17540060
[Journal Article] Erratum to : "Structure of flat piecewise Riemannian 2-polyhedra"2005
- Author(s)
  F. Ohtsuka
- Journal Title
  
  Math. J. Ibaraki Univ. 37
  
  Pages: 107-114
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17540060
[Journal Article] Structure of flat piecewise Riemannian 2-polyhedra2004
- Author(s)
  Fumiko Ohtsuka
- Journal Title
  
  Math.J.Ibaraki Univ. 36
  
  Pages: 57-64
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-13640060
[Journal Article] Structure of flat piecewise Riemannian 2-polyhedra2004
- Author(s)
  F.Ohtsuka
- Journal Title
  
  Math.J.Ibaraki Univ. 36
  
  Pages: 57-64
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-13640060
[Journal Article] Structure of flat piecewise Riemannian 2-polyhedra2004
- Author(s)
  Fumiko Ohtsuka
- Journal Title
  
  Math.J.Ibaraki Univ. 36
  
  Pages: 57-64
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-14540005
[Journal Article] Total excess on length surfaces2001
- Author(s)
  Yoshiroh Machigashira, Fumiko Ohtsuka
- Journal Title
  
  Math.Ann. 319
  
  Pages: 675-706
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-13640060
[Journal Article] Total excess on length surfaces2001
- Author(s)
  Y.Machigashira, F.Ohtsuka
- Journal Title
  
  Math.Ann. 319
  
  Pages: 675-706
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-13640060
[Journal Article] Total curvature of noncompact piecewise Riemannian 2-polyhedra
- Author(s)
  Jin-ichi Itoh, Fumiko Ohtsuka
- Journal Title
  
  Tsukuba J.Math. to appear
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-14540005
[Journal Article] Total curvature of noncompact piecewise Riemannian 2-polyhedra
- Author(s)
  Jin-ichi Itoh, Fumiko Ohtsuka
- Journal Title
  
  Tsukuba J.Math. (to appear)
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-14540005
[Journal Article] Total curvature of noncompact piecewise Riemannian 2-polyhedra
- Author(s)
  Jin-ichi Itoh, Fumiko Ohtsuka
- Journal Title
  
  Tsukuba J.Math. (to appear)
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-13640060
[Journal Article] Total curvature of noncompact piecewise Riemannian 2-polyhedra
- Author(s)
  Jin-ichi Itoh, Fumiko Ohtsuka
- Journal Title
  
  Tsukuba J.Math. to appear
- Data Source
  KAKENHI-PROJECT-14540005
[Journal Article] Total curvature of noncompact piecewise Riemannian 2-polyhedra
- Author(s)
  J.Itoh, F.Ohtsuka
- Journal Title
  
  Tsukuba J.Math. (発表予定)
- Data Source
  KAKENHI-PROJECT-13640060
[Journal Article] Total curvature of noncompact piecewise Riemannian 2-polyhedra
- Author(s)
  J.Itoh, F.Ohtsuka
- Journal Title
  
  Tsukuba J.Math. (accepted)
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-13640060

1. OSHIMA Hideaki (70047372)

# of Collaborated Projects: 7 results

# of Collaborated Products: 0 results
2. URABE Tohsuke (70145655)

# of Collaborated Projects: 6 results

# of Collaborated Products: 0 results
3. AIBA Akira (90202457)

# of Collaborated Projects: 5 results

# of Collaborated Products: 0 results
4. SHIMOMURA Katsunori (00201559)

# of Collaborated Projects: 5 results

# of Collaborated Products: 0 results
5. ITOH Jin-ich (20193493)

# of Collaborated Projects: 4 results

# of Collaborated Products: 6 results
6. MATSUDA Ryuki (10006934)

# of Collaborated Projects: 4 results

# of Collaborated Products: 0 results
7. TAMURA Hideo (30022734)

# of Collaborated Projects: 4 results

# of Collaborated Products: 0 results
8. MAEDA Sadahiro (40181581)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
9. HIAI Fumio (30092571)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
10. Kimura Makoto (30186332)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
11. TAKEUCHI Mamoru (40007761)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
12. ADACHI Toshiaki (60191855)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
13. 中村芳昭 (40007555)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
14. 入江博 (30385489)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
15. YAMAGISHI Masakazu (40270996)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
16. EJIRI Norio (80145656)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
17. YAGITA Nobuaki (20130768)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
18. MORISUGI Kaoru (00031807)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
19. 堀内利郎 (80157057)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
20. 小野瀬宏 (80007559)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
21. KAWASHITA Mishio (80214633)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
22. ONISHI Kazuei (20078554)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
23. IWATSUKA Akira (40184890)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
24. TANAKA Katumi (60207082)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
25. KATSUDA Atsushi (60183779)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
26. OHYAMA Yoshiyuki (80223981)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
27. HIRAMINE Yutaka (30116173)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
28. KANEMARU Tadayoshi (30040033)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
29. AGAOKA Yoshio (50192894)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
30. YAMAGAMI Shigeru (90175654)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
31. FUJIWARA Takanori (50183596)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
32. UDAGAWA Seiichi (70193878)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
33. SAEKI Akihiro (50270997)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
34. 荷見守助 (60007549)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
35. 岡本茂 (20034704)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
36. 山本和広 (30091515)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
37. 逸見豊 (70181477)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
38. 長坂浩史 (70308211)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
39. BAO Tuya

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results

Ohtsuka Fumiko 大塚 富美子

OHTSUKA Fumiko 大塚 富美子

大塚 冨美子 オオツカ フミコ

松久 富美子 マツヒサ フミコ

大塚 富美子

Research Projects

Research Products

Co-Researchers

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Research on the structure of polyhedra from the viewpoint of total curvaturePrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Research on the structure of ideal boundaries of piecewise Riemannian polyhedra from the viewpoint of total curvaturePrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Ohtsuka Fumiko 大塚富美子

OHTSUKA Fumiko 大塚富美子

大塚冨美子オオツカフミコ

松久富美子マツヒサフミコ

大塚富美子

完備・非コンパクトリーマン多様体の特徴付けに関する研究Principal Investigator