hasegawa keizou 長谷川敬三

… Alternative Names

Researcher Number	00208480
Other IDs
Affiliation (Current)	2019: 新潟大学, 人文社会科学系, フェロー
Affiliation (based on the past Project Information) *help	2009 – 2018: Niigata University, 人文社会・教育科学系, 教授 2013: 新潟大学, 人文社会教育科学系, 教授 2011: 新潟大学, 人文社会教育科学系, 教授 2010: 新潟大学, 人文社会・教育系, 教授 2010: 新潟大学, 人文社会教育科学系, 准教授 … More
Review Section/Research Field	Principal Investigator Geometry Except Principal Investigator Geometry / Geometry / Basic Section 11020:Geometry-related
Keywords	Principal Investigator ケーラー構造 / 局所共形ケーラー構造 / 等質多様体 / 複素構造 / Lie変換群 / ユニモジュラーリー群 / 簡約Lie群 / Kaehler structures / homogeneous complex / 国際研究者交流 (ドイツ, ロシア) … More Except Principal Investigator J-holomorphic curve / Kaehler structure / LcK structure / 概複素多様体 / 概ケーラー多様体 / Goldberg予想 / 概複素構造 / 基本群 / Walker計量 / 可解多様体 / J-正則曲線 / 概超複素多様体 / Goldberg conjecture / ケーラー構造 / Almost complex structure / 変換群 / Einstein manifold / 微分トポロジー / 6次元球面 / Parabolic構造 / Bott tower / Walker manifold / Fefferman / Reductive group / Modification / Holomorphic / 積分可能性 / 四元数構造 / Homogeneous space / Fefferman metric / Benson-Gordon予想 / 可微分剛性 / 佐々木アインシュタイン計量 / Fefferman-Lorentz structure / テスト配位 / infranil manifold / 複素多様体 / Lorentz structure / 6-dimensional sphere / 非球形多様体 / CR-submanifold / Holomorphic Isometry / (Almost) Kahler manifold / 小畠の定理 / Lorentz ｓtructure / 超極小J-正則曲線 / トーリック微分幾何 / CR-部分多様体 / 因果性 / Solvable group / Seifert fibering / complex contact / LCR構造 / リッチ固有値 / Infrasolv manifold / Donaldson-Tian-Yau予想 / アインシュタイン多様体 / 幾何学 / Lorentz構造 / 佐々木構造 / 偏極射影代数多様体 / スカラー曲率 / Developing / Isometry group / Lightlike vector field / Kaehler manifold / Unimodular group / Vague conjecture / K-安定性 / Seifert膜 / 平坦 / Weierstrass-Bryant公式 / HNN分解 / Walker metric / LCK structure / Blair-Ianus汎関数 / 概エルミート構造 / Seifert fibration / モンジュ=アンペール方程式 / Goldbergの予想 / Sasaki manifold / 可解等質空間 / アインシュタイン計量 / Conformalｌｙ flat / (概)ケーラー多様体 / Conformal structure / Nearly Kahler 6-dimensional sphere / Six dimensional sphere / Einstein metric / Goldherg予想 / Nearlyケーラー6次元球面 / 等質リーマン空間 / Homogeneous / lcK structure / Seifertファイバー空間 / 擬リーマン幾何学 / Unimodular Lie group / Integrability / 剛性 / Weyl curvature / Complex contact / Rigidity / Sasaki homogeneous space / Vaisman structure / Kaehler structurer / Uniformization / 多様体 / LCK / Vaisman / 結び目 / 複素解析幾何 / ケーラー多様体 / Homogeneous manifold / Almost complex manifold / 微分幾何学 / 無限群 / Spin(7) / Solvmanifold / 非球形空間 / ファイバー空間 / Holonomy / Heisenberg Lie group / CR構造 / Ricci soliton / Almost Kaehler manifold / ローレンツ幾何学 / 概Hypercomplex(擬)エルミート多様体 / Sasaki structure Less

Locally homogeneous Kaehler manifolds and Transformation groupsOngoing
- Principal Investigator
  
  神島芳宣
- Project Period (FY)
  2018 – 2020
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 11020:Geometry-related
- Research Institution
  Josai University
等質および局所等質多様体上の複素幾何構造についての研究Principal InvestigatorOngoing
- Principal Investigator
  
  長谷川敬三
- Project Period (FY)
  2016 – 2019
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Niigata University
Locally homogeneous non-Kaehler manifolds and Transformation groups
- Principal Investigator
  
  Kamishima Yoshinobu
- Project Period (FY)
  2015 – 2017
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Josai University
Study of Complex Structures and Conformal Geometric Structures on Homogeneous SpacesPrincipal Investigator
- Principal Investigator
  
  HASEGAWA KEIZO
- Project Period (FY)
  2013 – 2015
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Niigata University
Topology of conformally flat Lorentz manifold and various geometric structures
- Principal Investigator
  
  KAMISHIMA Yoshinobu
- Project Period (FY)
  2012 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Josai University
  Tokyo Metropolitan University
Complex structures on compact and non-compact homogeneous spacesPrincipal Investigator
- Principal Investigator
  
  HASEGAWA Keizo
- Project Period (FY)
  2009 – 2011
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Niigata University
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
Geometric structure on geometric manifolds which admit Lie group transformations and various Rigidity
- Principal Investigator
  
  KAMISHIMA Yoshinobu
- Project Period (FY)
  2008 – 2010
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Metropolitan University
Astudy on complex and Kaehler structures on compact homogeneous manifoldsPrincipal Investigator
- 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 structures
- 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
Geometry of Almost Complex Manifolds
- 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
無限群と多様体
- Principal Investigator
  
  垣水修
- Project Period (FY)
  1993
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Niigata University

All 2017 2016 2015 2014 2011 2010 2009 2007 2006 Other

All Journal Article Presentation

[Journal Article] Compact Homogeneous Locally Conformally K\"ahler Manifolds2016
- Author(s)
  K. Hasegawa, Y. Kamishima
- Journal Title
  
  Osaka J Math.
  
  Volume: *
- Open Access / Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K04852
[Journal Article] Compact Homogeneous Locally Conformally K\"ahler Manifolds2016
- Author(s)
  K. Hasegawa, Y. Kamishima
- Journal Title
  
  Osaka J. Math.
  
  Volume: 53 Pages: 683-703
- Open Access / Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K04852
[Journal Article] Compact Locally conformally Kaehler manifolds2016
- Author(s)
  K. Hasegawa and Y. Kamishima
- Journal Title
  
  Osaka Journal of Mathematics
  
  Volume: 53
- Acknowledgement Compliant / Open Access / Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25400066
[Journal Article] Compact Locally conformally Kaehler manifolds,2016
- Author(s)
  K. Hasegawa and Y. Kamishima,
- Journal Title
  
  Osaka Journal of Mathematics
  
  Volume: 53 Pages: 683-703
- Acknowledgement Compliant / Open Access / Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16K05123
[Journal Article] Homogeneous locally conformally Kaehler and Sasaki manifolds2015
- Author(s)
  D. Alekseevsky, V. Cortes, K. Hasegawa and Y. Kamishima
- Journal Title
  
  International Journal of Mathematics
  
  Volume: 26 Pages: 1-29
- Acknowledgement Compliant / Int'l Joint Research / Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25400066
[Journal Article] Locally conformaly Kaehler structures on homogeneous spaces2015
- Author(s)
  H. Hasegawa and Y. Kamishima
- Journal Title
  
  Progress in Mathematics, Birkhuyser
  
  Volume: 308 Pages: 353-372
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-24540087
[Journal Article] Locally Conformally Kaehler Structures on Homogeneous Spaces2015
- Author(s)
  K. Hasegawa and Y. Kamishima
- Journal Title
  
  Progress in Mathematics
  
  Volume: 印刷中
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25400066
[Journal Article] Homogeneous locally conformally Kähler and Sasaki manifolds2015
- Author(s)
  D. V. Alekseevsky, V. Cortés, K. Hasegawa, Y. Kamishima
- Journal Title
  
  International J Math.
  
  Volume: 26 (6) Pages: 1541001-29
- Int'l Joint Research / Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K04852
[Journal Article] Locally conformaly K\"ahler structures on homogeneous spaces2015
- Author(s)
  K. Hasegawa , Y. Kamishima
- Journal Title
  
  Progress in Mathematics
  
  Volume: 308 Pages: 353-372
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K04852
[Journal Article] Locally conformally Kaehler structures on homogeneous spaces2015
- Author(s)
  K. Hasegawa and Y. Kamishima
- Journal Title
  
  Progress in Mathematics
  
  Volume: 308 Pages: 353-372
- Acknowledgement Compliant / Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25400066
[Journal Article] Homogeneous locally conformally Koehler and Sasaki manifolds2015
- Author(s)
  D. Alekseevsky, V. Cortes, K. Hasegawa and Y. Kamishima
- Journal Title
  
  International Journal of Mathematics
  
  Volume: 印刷中
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25400066
[Journal Article] Homogeneous Locally Conformally Kaehler and Sasaki Manifolds2015
- Author(s)
  D. Alekseevsky, V. Cortes, K. Hasegawa, Y. Kamishima
- Journal Title
  
  International Journal of Mathematics.
  
  Volume: 近刊
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-24540087
[Journal Article] Locally conformaly Kaehler structures on homogeneous spaces2014
- Author(s)
  Y. Kamishima and K. Hasegawa
- Journal Title
  
  Progress in Math., Birkhauser
  
  Volume: **
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-24540087
[Journal Article] Small deformations and non-left-invariant complex structures on six-dimensional compact solvmanifolds2010
- Author(s)
  長谷川敬三
- Journal Title
  
  Differential Geom.Appl. Vol.28
  
  Pages: 220-227
- Data Source
  KAKENHI-PROJECT-20340013
[Journal Article] Small deformations and non-left-invariant complex structures on six-dimensional compact solvmanifolds2010
- Author(s)
  K. Hasegawa
- Journal Title
  
  Differential Geometry and its Applications
  
  Volume: Vol.28 Pages: 220-227
- Data Source
  KAKENHI-PROJECT-21540073
[Journal Article] Small deformations and non-left-invariant complex structures on six-dimensional compact solvmanifolds2010
- Author(s)
  Keizo Hasegawa
- Journal Title
  
  Differential Geometry and its Applications Vol.28
  
  Pages: 220-227
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21540073
[Journal Article] Small deformations and non-left-invariant complex structures on six-diensional compact solvmanifolds2010
- Author(s)
  K.Hasegawa
- Journal Title
  
  Diff. Geom. Appl.
  
  Volume: 28 Pages: 220-227
- DOI
  10.1016/j.difgeo.2009.10.003
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20244005
[Journal Article] Small deformations and non-left-invariant complex structures on six-dimensional compact solvmanifolds2010
- Author(s)
  K.Hasegawa
- Journal Title
  
  Differential Geom.Appl.
  
  Volume: 28 Pages: 220-227
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20244005
[Journal Article] Complex and Kahler structures on compact homogeneous manifolds-their existence, classification and moduli problem2009
- Author(s)
  K. Hasegawa
- Journal Title
  
  Advanced Studies in Pure Mathematics
  
  Volume: Vol.56 Pages: 151-168
- Data Source
  KAKENHI-PROJECT-21540073
[Journal Article] Complex and Kaehler structures on compact homogeneous manifolds2009
- Author(s)
  Keizo Hasegawa
- Journal Title
  
  Advanced Studies and Pure Mathematics Vol.562
  
  Pages: 151-167
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21540073
[Journal Article] Complex and Kahler structures on compact homogeneous manifolds-their existence, classification and moduli problem2009
- Author(s)
  長谷川敬三
- Journal Title
  
  Adv.Stud.Pure Math., 56, Math.Soc.Japan, Tokyo Vol.56,
  
  Pages: 151-167
- Data Source
  KAKENHI-PROJECT-20340013
[Journal Article] Complex moduli and pseudo-Kaehler structures on three-dimensional compact complex solvmanifolds2007
- Author(s)
  K. Hasegawa (長谷川敬三)
- Journal Title
  
  Electronic Research Announcements in Mathematical Sciences Vol.14
  
  Pages: 30-34
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540075
[Journal Article] Complex moduli and pseudo-Kaehler structures on three-dimensional compact complex solvmanifolds2007
- Author(s)
  K, Hasegawa
- Journal Title
  
  Electronic Research Announcements in Mathematical Sciences Vol.14
  
  Pages: 30-34
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-18540075
[Journal Article] Complex moduli and pseudo-Kaehler structures on three-dimensional compact complex solvmanifolds2007
- Author(s)
  K. Hasegawa(長谷川敬三)
- Journal Title
  
  Electronic Research Announcements in Mathematical Sciences, Vol.14
  
  Pages: 30-34
- 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 compact solvmanifolds with Kaehler Structures2006
- Author(s)
  K, Hasegawa
- Journal Title
  
  Osaka Journal of Mathematics Vol.43
  
  Pages: 131-135
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-18540075
[Journal Article] A note on compact solvmanifolds with Kaehler structures2006
- Author(s)
  K.Hasegawa
- Journal Title
  
  Osaka Journal of Mathematics 43
  
  Pages: 131-135
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16540057
[Journal Article] A note on compact solvmanifolds with Kaehler structures2006
- Author(s)
  K. Hasegawa(長谷川敬三)
- Journal Title
  
  Osaka Journal of Mathematics Vol.43
  
  Pages: 131-135
- 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 compact solvmanifolds with Kaehler structures2006
- Author(s)
  長谷川敬三
- Journal Title
  
  Osaka Journal of Mathematics 43
  
  Pages: 131-135
- Data Source
  KAKENHI-PROJECT-18540075
[Journal Article] A note on compact solvmanifolds with Kaehler structures2006
- Author(s)
  K.Hasegawa
- Journal Title
  
  Osaka I. Math. 43
  
  Pages: 131-135
- Data Source
  KAKENHI-PROJECT-16540057
[Journal Article] A note on compact solmanifolds with Kaehler structures2006
- Author(s)
  K.Hasegawa
- Journal Title
  
  Osaka J. Math. 43
  
  Pages: 131-135
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-16540057
[Journal Article] A note on compact solvmanifolds with Kaehler structures
- Author(s)
  K.Hasegawa
- Journal Title
  
  Osaka J.Math. (印刷中)
- Data Source
  KAKENHI-PROJECT-16540057
[Presentation] Homogeneous Sasaki and Vaisman manifolds of unimodular Lie groups2017
- Author(s)
  Keizo Hasegawa
- Organizer
  Differential Geometry Seminar, University of Hamburg
- Invited
- Data Source
  KAKENHI-PROJECT-16K05123
[Presentation] Locally conformally Kaehler homogeneous spaces of unimodular Lie groups,2016
- Author(s)
  K. Hasegawa
- Organizer
  The 8-th TIMS-OCAMI-WASEDA Joint International Workshop on Differential Geometry and Geometric Analysis
- Place of Presentation
  早稲田大学，東京
- Year and Date
  2016-12-13
- Int'l Joint Research / Invited
- Data Source
  KAKENHI-PROJECT-16K05123
[Presentation] Compact locally homogeneous Kaehler and lcK manifolds,2015
- Author(s)
  長谷川敬三
- Organizer
  第21回複素幾何学シンポジュウム
- Place of Presentation
  金沢大学，石川県金沢市
- Year and Date
  2015-10-28
- Int'l Joint Research / Invited
- Data Source
  KAKENHI-PROJECT-25400066
[Presentation] Locally conformally ahler structures on homogeneous spaces, Geometric Structures on Complex Manifolds2011
- Author(s)
  K. Hasegawa
- Place of Presentation
  Steklov研究所(モスクワ)
- Data Source
  KAKENHI-PROJECT-21540073
[Presentation] Locally conformal Kaehler structures on homogeneous spaces2011
- Author(s)
  長谷川敬三
- Organizer
  国際研究集会「Geometric Structures on Complex Manifolds」
- Place of Presentation
  Steklov Institute,モスクワ(招待講演)
- Year and Date
  2011-10-05
- Data Source
  KAKENHI-PROJECT-21540073
[Presentation] Locally Conformal Kaehler Structures on Homogeneous Spaces2010
- Author(s)
  長谷川敬三
- Organizer
  Lie変換群と複素幾何学
- Place of Presentation
  ナスパニューオータニ(越後湯沢)
- Year and Date
  2010-09-29
- Data Source
  KAKENHI-PROJECT-21540073
[Presentation] Complex geometric structures on Lie groups and their compact quotient spaces2009
- Author(s)
  長谷川敬三
- Organizer
  Hayama Symposium on Several Complex Analysis in Several Variables
- Place of Presentation
  湘南国際村センター(葉山)
- Year and Date
  2009-07-21
- Data Source
  KAKENHI-PROJECT-21540073
[Presentation] Complex geometric structures on Lie groups and their compact quotient spaces2009
- Author(s)
  K. Hasegawa
- Organizer
  第13回多変数関数論葉山シンポジウム
- Place of Presentation
  葉山
- Data Source
  KAKENHI-PROJECT-21540073
[Presentation] Locally conforamal Kaehler structures on homogeneous and locally homogenous spaces2009
- Author(s)
  長谷川敬三
- Organizer
  The 15^<th> International Symposium on Complex Geometry
- Place of Presentation
  菅平高原(上田市)
- Year and Date
  2009-10-31
- Data Source
  KAKENHI-PROJECT-21540073
[Presentation] Complex Keahler structures on compact homogeneous manifolds-their existence, classification and moduli problem2007
- Author(s)
  K, Hasegawa
- Organizer
  Special lecture
- Place of Presentation
  Mathematical Society of Japan
- Year and Date
  2007-03-29
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-18540075
[Presentation] Complex and Pseudo-Kaehler structures on compact homogeneous manifolds2007
- Author(s)
  K. Hasegawa (長谷川敬三)
- Organizer
  Niigata Workshop on Complex Geometry and Singularities (新潟研究集会「複素幾何学と特異点」)
- Place of Presentation
  新潟市クロスパルにいがた
- Year and Date
  2007-08-21
- Data Source
  KAKENHI-PROJECT-18540075
[Presentation] Complex Keahler structures on compact homogeneous manifolds-their existence, classification and moduli problem2007
- Author(s)
  長谷川敬三
- Organizer
  日本数学会年会幾何学分科会
- Place of Presentation
  埼玉大学
- Year and Date
  2007-03-29
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-18540075
[Presentation] Non-Kaehler Geometric Structures on Homogeneous Spaces
- Author(s)
  長谷川敬三
- Organizer
  Complex Hyperbolic Geometry and Related Topics
- Place of Presentation
  岡山理科大学
- Year and Date
  2015-01-09 – 2015-01-11
- Invited
- Data Source
  KAKENHI-PROJECT-25400066

1. KAMISHIMA Yoshinobu (10125304)

# of Collaborated Projects: 7 results

# of Collaborated Products: 13 results
2. SEKIGAWA Kouei (60018661)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
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20. ISHI Hideyuki (00326068)

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23. 垣水修 (80211150)

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28. Alekseevsky Dmitri. A.

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
29. Cortés Vicente

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
30. Baues Oliver

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results

hasegawa keizou 長谷川 敬三

HASEGAWA Keizo 長谷川 敬三

長谷川 敬三 ハセガワ ケイゾウ

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Locally homogeneous Kaehler manifolds and Transformation groupsOngoing

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等質および局所等質多様体上の複素幾何構造についての研究Principal InvestigatorOngoing

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Locally homogeneous non-Kaehler manifolds and Transformation groups

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Study of Complex Structures and Conformal Geometric Structures on Homogeneous SpacesPrincipal Investigator

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Topology of conformally flat Lorentz manifold and various geometric structures

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Complex structures on compact and non-compact homogeneous spacesPrincipal Investigator

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Geometry of Ricci solitons on complex manifolds

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Geometric structure on geometric manifolds which admit Lie group transformations and various Rigidity

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Astudy on complex and Kaehler structures on compact homogeneous manifoldsPrincipal Investigator

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Study of topis related to almost complex structures

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Geometry of Almost Complex Manifolds

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無限群と多様体

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[Journal Article] Compact Homogeneous Locally Conformally K\"ahler Manifolds2016

Author(s)

hasegawa keizou 長谷川敬三

HASEGAWA Keizo 長谷川敬三

長谷川敬三ハセガワケイゾウ

[Journal Article] Homogeneous locally conformally Kähler and Sasaki manifolds2015