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2008 Fiscal Year Final Research Report

Convergence・collapsing theory of manifolds, Ricci flows and the geometry and analysis of singular spaces

Research Project

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Project/Area Number 17204003
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Geometry
Research InstitutionUniversity of Tsukuba

Principal Investigator

YAMAGUCHI Takao  University of Tsukuba, 大学院・数理物質科学研究科, 教授 (00182444)

Co-Investigator(Kenkyū-buntansha) FUKAYA Kenji  京都大学, 大学院・理学研究科, 教授 (30165261)
KASUE Atsuhi  金沢大学, 大学院・自然科学研究科, 教授 (40152657)
SHIOYA Takashi  東北大学, 大学院・理学研究科, 教授 (90235507)
TODA Masahito  お茶の水女子大学, 大学院・人間文化研究科, 教授 (80291566)
ITOH Mitsuhiro  筑波大学, 大学院・数理物質科学研究科, 教授 (40015912)
OTSU Yukio  九州大学, 大学院・数理学研究院, 准教授 (80233170)
KAWAMURA Kazuhiro  筑波大学, 大学院・数理物質科学研究科, 准教授 (40204771)
NAGANO Koichi  筑波大学, 大学院・数理物質科学研究科, 講師 (30333777)
SATOH Hiroyasu  筑波大学, 大学院・数理物質科学研究科, 準研究員 (00375396)
Project Period (FY) 2005 – 2008
Keywordsリーマン多様体 / 崩壊 / アレクサンドロフ空間 / リッチ流
Research Abstract

曲率が上に有界な2次元特異空間の局所構造を完全に決定し、ガウスボンネ型定理を得た(永野幸一、塩谷隆、B.Kleiner3氏との共同研究)。
断面曲率が下に直径が上に一様に有界な多様体或は特異空間に対して、本質的被覆なる新しい不変量を発見し、それが一様に有界であることを証明した。これによりグロモフ氏のベッチ数有界性定理の新しい見地からの別証明を得た。
ペレルマン氏のリッチ流に関する仕事を解明し、3次元多様体のリッチ流の特異時間における退化現象を解明した。
軌道体に対するゲルファンド・スペクトル逆問題を考察し、その局所スペクトラルデータから軌道体の等長同型構造が完全に決定されることを証明した(Y. Kurylev, M.Lassas 氏との共同研究)

  • Research Products

    (43 results)

All 2009 2008 2007 2006 2005

All Journal Article (28 results) (of which Peer Reviewed: 25 results) Presentation (14 results) Book (1 results)

  • [Journal Article] An upper curvature bound and singularities, Noncommutativity and Singularities2009

    • Author(s)
      T. Yamaguchi
    • Journal Title

      Advanced Studies in Pure Mathematics 55

      Pages: 161-171

    • Peer Reviewed
  • [Journal Article] On the root closedness of continuous function algebras2009

    • Author(s)
      Kawamura, Kazuhiro; Miura, Takeshi
    • Journal Title

      Topology Appl 156,no.3

      Pages: 624-628

    • Peer Reviewed
  • [Journal Article] Exact Lagrangian submanifolds in simply-connected cotangent bundles2008

    • Author(s)
      Fukaya, Kenji ; Seidel, Paul ; Smith, Ivan
    • Journal Title

      Invent. Math 172,no. 1

      Pages: 1-27

    • Peer Reviewed
  • [Journal Article] Variational convergence over metric spaces,Trans2008

    • Author(s)
      Kuwae, Kazuhiro ; Shioya, Takashi
    • Journal Title

      Amer. Math. Soc 360

      Pages: 347-353

    • Peer Reviewed
  • [Journal Article] A note on the Fisher information metric and heat kernels2008

    • Author(s)
      Itoh, Mitsuhiro ; Satoh, Hiroyasu ; Shishido, Yuichi
    • Journal Title

      Int. J. Pure Appl. Math 46

      Pages: 347-353

    • Peer Reviewed
  • [Journal Article] The Serre duality theorem for a non-compact weighted CR manifold2008

    • Author(s)
      Itoh, Mitsuhiro ; Masamune, Jun ; Saotome, Takanari
    • Journal Title

      Proc. Amer. Math. Soc 136no. 10

      Pages: 3539-3548

    • Peer Reviewed
  • [Journal Article] Fisher information metric and Poisson kernels2008

    • Author(s)
      Itoh, Mitsuhiro ; Shishido, Yuichi
    • Journal Title

      Differential Geom. Appl 26no. 4

      Pages: 347-356

    • Peer Reviewed
  • [Journal Article] The Serre duality for holomorphic vector bundles over strongly pseudo convex CR manifoldsProceedings of the Eleventh International Workshop on Differential Geometry2007

    • Author(s)
      Itoh, Mitsuhiro
    • Journal Title

      Kyungpook Nat. Univ., Taegu,

      Pages: 17-24

  • [Journal Article] 3-dim Seiberg-Witten theory and the Thurston's geometric structures.Proceedings of the Eleventh International Workshop on Differential Geometry2007

    • Author(s)
      Itoh, Mitsuhiro
    • Journal Title

      Kyungpook Nat. Univ., Taegu

      Pages: 9-16

  • [Journal Article] The Serre duality theorem for holomorphic vector bundles over a strongly pseudo-convex manifold2007

    • Author(s)
      Itoh, Mitsuhiro ; Saotome, Takanari
    • Journal Title

      Tsukuba J. Math 31no. 1

      Pages: 197-204

    • Peer Reviewed
  • [Journal Article] Dirichlet finite harmonic functions and points at infinity of graphs and manifolds2007

    • Author(s)
      Hattori, Tae ; Kasue, Atsushi,
    • Journal Title

      Proc. Japan Acad. Ser. A Math. Sci 83

      Pages: 129-134

    • Peer Reviewed
  • [Journal Article] On the existence of continuous (approximate) roots of algebraic equations2007

    • Author(s)
      Kawamura, Kazuhiro ; Miura, Takeshi
    • Journal Title

      Topology Appl 154no. 2

      Pages: 434-442

    • Peer Reviewed
  • [Journal Article] Root closed function algebras on compacta of large dimension2007

    • Author(s)
      Brodskiy, N. ; Dydak, J. ; Karasev, A. ; Kawamura, K.
    • Journal Title

      Proc. Amer. Math. Soc 135no. 2

      Pages: 587-596

    • Peer Reviewed
  • [Journal Article] Almost Hermitian structures on tangent bundles. Proceedings of the Eleventh International Workshop on Differential Geometry2007

    • Author(s)
      Satoh, Hiroyasu
    • Journal Title

      Kyungpook Nat. Univ., Taegu

      Pages: 105-118

  • [Journal Article] Fixed point sets of parabolic isometries of CAT(0)-spaces, Comment2006

    • Author(s)
      Fujiwara, Koji ; Shioya, Takashi ;Koichi Nagano
    • Journal Title

      Math. Helv 81

      Pages: 1305-1335

    • Peer Reviewed
  • [Journal Article] Floer homology in symplectic geometry and in mirror symmetry. International Congress of Mathematicians2006

    • Author(s)
      Oh, Yong-Geun ; Fukaya, Kenji
    • Journal Title

      Eur. Math. Soc., Zurich Vol. II

      Pages: 879-905

    • Peer Reviewed
  • [Journal Article] Application of Floer homology of Langrangian submanifolds to symplectic topology. [Application of Floer homology of Lagrangian submanifolds to symplectic topology] Morse theoretic methods in nonlinear analysis and in symplectic topology2006

    • Author(s)
      Fukaya, Kenji
    • Journal Title

      NATO Sci. Ser. II Math. Phys. Chem.(Springer, Dordrecht) 217

      Pages: 231-276

    • Peer Reviewed
  • [Journal Article] Convergence of Riemannian manifolds and Laplace operators. II2006

    • Author(s)
      Kasue, Atsushi
    • Journal Title

      Potential Anal 24

      Pages: 137-194

    • Peer Reviewed
  • [Journal Article] Metric Riemannian geometry2006

    • Author(s)
      Fukaya, Kenji
    • Journal Title

      Handbook of differential geometry Vol. II

      Pages: 189-313

    • Peer Reviewed
  • [Journal Article] Variational convergence of finite networks2006

    • Author(s)
      Kasue, Atsushi
    • Journal Title

      Interdiscip. Inform. Sci 12no. 1

      Pages: 57-70

    • Peer Reviewed
  • [Journal Article] The dual Thurston norm and the geometry of closed 3-manifolds2006

    • Author(s)
      Itoh, Mitsuhiro ; Yamase, Takahisa
    • Journal Title

      Osaka J. Math 43no.1

      Pages: 121-129

    • Peer Reviewed
  • [Journal Article] Volume collapsed three-manifolds with a lower curvature bound2005

    • Author(s)
      T.Shioya and T.Yamaguchi
    • Journal Title

      Math. Annalen 333

      Pages: 131-155

    • Peer Reviewed
  • [Journal Article] Multivalued Morse theory, asymptotic analysis and mirror symmetry. Graphs and patterns in mathematics and theoretical physics2005

    • Author(s)
      Fukaya, Kenji
    • Journal Title

      Proc. Sympos. Pure Math(Amer. Math. Soc., Providence, RI) 73

      Pages: 205-278

    • Peer Reviewed
  • [Journal Article] Miyaoka-Yau inequality and complex hyperbolicity. Topics in almost Hermitian geometry and related fields2005

    • Author(s)
      Itoh, Mitsuhiro
    • Journal Title

      World Sci. Publ., Hackensack, NJ

      Pages: 105-112

    • Peer Reviewed
  • [Journal Article] On a conjecture of Wood2005

    • Author(s)
      Kawamura, Kazuhiro
    • Journal Title

      Glasg. Math. J. 47no. 1

      Pages: 1-5

    • Peer Reviewed
  • [Journal Article] Valov, V. On $C\sp ^*$-algebras with the approximate $n$-th root property2005

    • Author(s)
      Chigogidze, A. ; Karasev, A. ; Kawamura, K.
    • Journal Title

      Bull. Austral. Math. Soc 72(no. 2)

      Pages: 197-212

    • Peer Reviewed
  • [Journal Article] Tymchatyn, E. D. Hereditarily indecomposable inverse limits of graphs2005

    • Author(s)
      Kawamura, K. ; Tuncali, H. M.
    • Journal Title

      Fund. Math 185no. 3

      Pages: 195-210

    • Peer Reviewed
  • [Journal Article] 4-dimensional almost Kahler manifolds and $L\sp 2$-scalar curvature functional2005

    • Author(s)
      Satoh, Hiroyasu
    • Journal Title

      Differential Geom. Appl 23no.2

      Pages: 114-127

    • Peer Reviewed
  • [Presentation] Geometric analysis on Alexandrov spaces2008

    • Author(s)
      T. Shioya
    • Organizer
      spaces,/Seminaire Borel : New approaches to curvature
    • Place of Presentation
      スイス レディアブラレ, 4回連続講演
    • Year and Date
      20080825-29
  • [Presentation] Functions of finite Dirichlet sum and compactifications of infinite graphs,The 1st MSJ-SI2008

    • Author(s)
      A.Kasue
    • Organizer
      Probabilistic Approach to Geometry
    • Place of Presentation
      Kyoto
    • Year and Date
      20080728-0808
  • [Presentation] Collapsing and essential covering of Riemannian manifolds, Global KMS International Conference2008

    • Author(s)
      T. Yamaguchi
    • Organizer
      Invited address
    • Place of Presentation
      Jeju,Korea
    • Year and Date
      2008-10-24
  • [Presentation] Convergence of surfaces with bounded total absolute curvature, Analysis seminar2008

    • Author(s)
      T. Yamaguchi
    • Organizer
      Kings College,
    • Place of Presentation
      London, England
    • Year and Date
      2008-10-16
  • [Presentation] Collapsing and essential covering of Riemannian manifolds, 9th Pacific Rim Geometry Conference2008

    • Author(s)
      T. Yamaguchi
    • Organizer
      Invited address,National Taiwan University
    • Place of Presentation
      Taipei,Taiwan, Dec
    • Year and Date
      2008-10-14
  • [Presentation] Perelman による幾何化予想解決2008

    • Author(s)
      山口孝男
    • Organizer
      日本数学会・日本物理学会合同講演会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-22
  • [Presentation] SLaplacian on Alexandrov spaces2007

    • Author(s)
      T.Shioya
    • Organizer
      Stochastic calculus on manifolds, graphs, and random structures
    • Place of Presentation
      ドイツハウスドルフ数学研究所
    • Year and Date
      20071008-12
  • [Presentation] Two-dimensional Alexandrov spaces with curvature bounded above,International Conference2007

    • Author(s)
      T. Yamaguchi
    • Organizer
      Russian-German Geometry Meeting dedicated to the 95th-anniversary of A.D.Alexandrov
    • Place of Presentation
      St. Petersburg, Russia
    • Year and Date
      20070618-27
  • [Presentation] Laplacian on Alexandrov spaces2006

    • Author(s)
      T.Shioya
    • Organizer
      日中友好幾何学研究集会
    • Place of Presentation
      中国昆明
    • Year and Date
      20061214-22
  • [Presentation] An upper curvature bound and singularities2006

    • Author(s)
      T. Yamaguchi
    • Organizer
      Singularities, Hayashibara forum, IHES, Bure-sur-Yvett
    • Place of Presentation
      France
    • Year and Date
      20060920-23
  • [Presentation] 3次元多様体の崩壊2006

    • Author(s)
      塩谷隆
    • Organizer
      日本数学会秋季総合分科会
    • Place of Presentation
      大阪市立大学,幾何学賞授賞講演
    • Year and Date
      20060919-22
  • [Presentation] Collapsing $4$-manifolds under a lower curvature bound, I-IX (series of lectures)2006

    • Author(s)
      T. Yamaguchi
    • Organizer
      University of Maryland,College Park
    • Place of Presentation
      USA
    • Year and Date
      20060313-17
  • [Presentation] CAT(1)空間に対する球面定理2006

    • Author(s)
      永野幸一
    • Organizer
      日本数学会2006年度秋季総合分科会, 幾何学分科会特別講演
    • Place of Presentation
      大阪市立大学
    • Year and Date
      2006-09-21
  • [Presentation] CAT(1)空間の位相正則性2006

    • Author(s)
      永野幸一
    • Organizer
      第53回幾何学シンポジウム, 全体講演
    • Place of Presentation
      金沢大学
    • Year and Date
      2006-08-05
  • [Book] 3次元トポロジーの新展開---リッチフローとポアンカレ予想2007

    • Author(s)
      戸田正人
    • Total Pages
      200
    • Publisher
      サイエンス社

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Published: 2010-06-10   Modified: 2016-04-21  

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