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Global Study of Conformal Riemannian Structures

Research Project

Project/Area Number 09640084
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Geometry
Research InstitutionTohoku University

Principal Investigator

NAYATANI Shin  Tohoku University, Graduate School of Science, Associate Professor, 大学院・理学研究科, 助教授 (70222180)

Co-Investigator(Kenkyū-buntansha) BANDO Shigetoshi  Tohoku University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (40165064)
NISHIKAWA Seiki  Tohoku University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (60004488)
NAKAGAWA Yasuhiro  Tohoku University, Graduate School of Science, Research Assistant, 大学院・理学研究科, 助手 (90250662)
IZEKI Hiroyasu  Tohoku University, Graduate School of Science, Associate Professor, 大学院・理学研究科, 助教授 (90244409)
AKUTAGAWA Kazuo  Shizuoka University, Faculty of Science Associate Professor, 理学部, 助教授 (80192920)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1998: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1997: ¥1,900,000 (Direct Cost: ¥1,900,000)
KeywordsRank One Symmetric Space / CR Structure / Harmonic Map / Minimal Map / Kleinian Group / Conformally Flat Manifold / Kahler-Einstein Metric / Stability / 階数1対称空間 / アインシュタイン計量 / 二木指標 / クライン群 / 共形平坦多様体 / 複素クライン群 / 擬エルミート構造 / アインシュタイン・ケーラー計量 / 平均曲率一定曲面
Research Abstract

Shin Nayatani considered the action of a discrete transformation group of a rank one symmetric space on its boundary at infinity, and studied a canonical invariant metric defined on the domain of discontinuity. In particular, he applied it to the study of the topology of the quotient manifold when the symmetric space is complex hyperbolic space, and also formulated the quaternionic analogue of CR structure/geometry, applying it to the study of the canonical metric in the quatenionic case. He also investigated geometric structures on the Furstenberg boundaries of some higher rank symmetric spaces.
Kazuo Akutagawa studied harmonic maps from hyperbolic space to a certain incomplete, negatively curved Riemannian manifold. In particular, he obtained results on the existence, uniqueness and regularity of solutions for the boundary value problem. He also made fundamental research on minimal maps between Riemannian manifolds, and obtained results on the existence and representation of minimal d … More iffeomorphisms between hyperbolic disks.
Hiroyasu Izeki proved a vanishing theorem for the cohomology of flat Hilbert space bundles over a conformally flat manifold, obtained as the quotient of a spherical domain by a Kleinian group, and applied it to the study of the Hausdorff dimension of the limit set.
Yasuhiro Nakagawa investigated the Bando-Calabi-Futaki character, a generalization of the Futaki character. He extended Futaki-Morita's result that interpreted the Futaki character as a Godbillon-Vey invariant, to the case of the Bando-Calabi-Futaki character.
Seiki Nishikawa studied the boundary value problem for hamonic maps between homogenious Riemannian manifolds of negative curvature. In particular, he obtained results on the necessary condition which the boundary value should satisfy, the uniqueness of solution and the existence of solution for a suitable boundary value, in the case of the Carnot spaces.
Shigetoshi Bando studied the existence problem for Einstein metrics on Kahler manifolds and holomorphic vector bundles as well as its relation to the stability and degeneration phenomenon. He also investigated singular geometric structures which appeared as the limit of degeneration. Less

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (57 results)

All Other

All Publications (57 results)

  • [Publications] 納谷 信: "Self-dual manifolds with positive Picci curuature" Mathematisches Zeitsehrift. 224. 49-63 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 納谷 信: "Patterson-Sullivan measure and corfornclly flat metrics" Mathematisches Zeitschrift. 225. 115-131 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 納谷 信: "Discrele groups of complex hyper bolic isometries and pseudohermihen structures" Proceedings of the 40th Taniguchi Symposium に発表予定(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 納谷信・井関裕靖: "Canomical metric on the domain of discatinniry of a Kleinian group" Seminaire de theone spectrcle et georetre. 16. 9-32 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 芥川和雄: "Kenmotsu-Brycnt type representatan fornula for constant mean curvature spacelike sunfaces in H^3_1(-C^2)" Differential Geonutry and its Application. 9. 251-272 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 芥川和雄: "Kenmotsu-Bryant type representation formulas for constant mean curvatune surfaces in H^3(-C^2) and S^3_1(C^2)" Annals of Global Analyns and Geometry. 17. 49-75 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 芥川和雄: "Representation formulas fin surfaces in H^3(-C^2) and harmonic maps arising from CMC surfaces" ″Harmonic Morphisms, Harmonic Maps and Related Topics″ に発表予定.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 芥川和雄: "Harmonic maps between hyperbolic spaces" Sugagu Expositions (AMS) に発表予定.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 芥川和雄: "Spin^c geometry, the Seibeng-Witten equctions and Yamabe invariants of kshe surfeos" Inter disciplinary Information Sciences に発表予定.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 井関裕靖: "The Teichmuller distance on the space of flat conformal structures" Conformal Geometry and Dynmics. 2. 1-24 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 井関裕靖: "G.Besson, G.Courtois and S.GallotによるMostowの剛性定理の新証明" 数学(岩波書店). 49. 200-211 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 中川泰宏: "Conbinatorial formulag for tutabi characters and generalired Killing forms of tonc Fauo or bifolds" Proceedings of the Pacific Rim geonetry Conference に発表予定.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 中川泰宏: "Bando-Calabi-Futaki characters of Kchler abifolds" Mathematische Annalen に発表予定.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 西川青季: "Inverce spectral theory for Diencnnicu foliations and curvature theory" Trends in Mathematics, Birlehauser. 86-94 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 西川青季: "Dirichlet problem at imfihity for harmonic maps between Carnot spaces" Proceedings of Japan Aeademy Ser.A. 73. 168-169 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 板東重稔: "Einstein-kahler 計量の存在問題-正スカラー曲率の場合" 数学(岩波書店). 50. 358-367 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 西川青季: "幾何学的変分問題" 岩波書店, 220 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shin Nayatani: "Self-dual manifolds with positive Ricci curvature" Mathematisches Zeitschrift. 224. 49-63 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shin Nayatani: "Patterson-Sullivan measure and conformally flat metrics" Mathematisches Zeitschrift. 225. 115-131 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shin Nayatani and Hiroyasu Izeki: "Canonical metric on the do-main of discontinuity of a Kleinian group" Seminaire de theorie spectrale et geometrie. 16. 9-32 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shin Nayatani: "Discrete groups of complex hyperbolic isometries and pseudohermitian structures" Proceedings of the 40th Taniguchi Symposium on "Analysis and Geometry in Several Com-plex Variables". (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kazuo Akutagawa, Kenmotsu: "Bryant type representation formula for constant mean curvature spacelike surfaces in H^3_(-c^2)" Differential Geometry and its Application. 9. 251-272 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kazuo Akutagawa, Kenmotsu: "Bryant type representation formu-las for constant mean curvature surfaces in H^3(-c^2) and S^3_(c^2)" Annals of Global Analysis and Geometry. 17. 49-75 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kazuo Akutagawa: "Representation formulas for surfaces in H^3(-c^2) and harmonic maps arising from CMC surfaces" "Harmonic Morphisms, Harmonic Maps and Related Topics" (ed.J.C.Wood et al., Brest 1997), Pitman Research Notes in Mathematics Series. (to appear.). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kazuo Akutagawa: "Harmonic maps between hyperbolic spaces" Sugaku Expositions, American Mathematical Society. (to appear.). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kazuo Akutagawa: "Spin^c geometry, the Seiberg-Witten equations and Yamabe invariants of Kahler surfaces" Interdisciplinary Information Sciences. (to appear.). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hiroyasu Izeki: "The Teichmuller distance on the space of flat con-formal structures" Conformal Geometry and Dynamics. 2. 1-24 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hiroyasu Izeki: "A new proof of the Mostow rigidity theorem after G.Besson, G.Courtois and S.Gallot" Suugaku (Iwanami). 49 (in Japanese). 200-211 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yasuhiro Nakagawa: "Combinatorial formulae for Futaki characters and generalized Killing forms of toric Fano orbifolds" "Proceedings of the Pacific Rim Geometry Conference, Korea". (to appear).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yasuhiro Nakagawa: "Bando-Calabi-Futaki characters of Kahler orbifolds" Mathematische Annalen. (to appear).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Seiki Nishikawa: "Inverse spectral theory for Riemannian foliations and curvature theory" Trends in Mathematics, edited by S.Anders-son Birkhauser.86-94 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Seiki Nishikawa: "Dirichlet problem at infinity for harmonic maps between Carnot spaces" Proceedings of Japan Academy Ser.A.73. 168-169 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shigetoshi Bando: "Existence problem for Einstein-Kahler metrics-case of positive scalar curvature" Suugaku (Iwanami). 50 (in Japanese). 358-367 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Seiki Nishikawa: Variational Problems in Geometry. Iwanami, 220 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 納谷信・井関裕靖: "Carouical metric on the domain of discontinuity of a Kleinian group" Seminaire de theorie Spectrale et geometric. 16. 9-32 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 納谷 信: "Discrete groups of complex hyperbolic irometries and pseudohenitian structures" Proceediys of the 40th Taniguchi symposium に発表予定(印刷中). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 芥川和雄: "Kenmotsu-Brgant type representation formula for constant mean wrurtue spacelike scrfaces in H^^3__1(-C^2)" Diffectial geometing and its Application. 9. 251-272 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 芥川和雄: "Keunotsr-Bryamt type represeutation formulas for constant mean wrvature surfaus in H^3(-C^2) and S^^3__1(-C^2)" Annals of Global Analyses and geonetrg. 17. 49-75 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 芥川和雄: "Representlon formulas for surfaces in H^3(-C^2) and harnonis maps anising from CMC sunfaces" " Harmonic Morphisms, Harmonic Maps and Relatcd Topics "に発表予定. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 芥川和雄: "Spin^c geonretry the Seibag-nittcn egnations and Yamabe incariants of Kchler scnfans" Interdiseiplinarg Jrformction Sciencesに発表予定. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 井関裕靖: "The Teichmulles Matanu on space of flat conformal structures" Confornal geonatry and Dynamics. 2. 1-24 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 中川泰宏: "Conbinatonial formulae for Futahi chanacters and genralind Killing forms of torin Fano orbifolds" Proceedings of the pacific Rim geometrg Conferceに発表予定. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 中川泰宏: "Bando-Calabi-Futaki characters of Kchle orbifolas" Mathemctische Annalesに発表予定. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 板東重稔: "Einstein-Kahle 計量の存在問題-正スカラー曲率の場合" 数学(岩波書店). 50. 358-367 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 西川青季: "幾何学的変分問題" 岩波書店, 220 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 納谷 信: "Self-dual manifolds with positive Rieci curvature" Mathematisches 2eitschrift. 224. 49-63 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 納谷 信: "Pattcrson-Sullivan measure and coufornally flat metrics" Mathematisches 2eitschrift. 225. 115-131 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 納谷 信: "Discretc groups of complex hyperlolic isometries and psendohermitian Structures" Proceedings of the 40th Taniguchi Symposium 12発表予定. (998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 西川 青季: "Inverse spectral theory for Riemannian foliations and curvature theory" Trends in Mathematics,S.Andersson(ed),Birlshauper. 86-94 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 西川 青季: "Dirichlet proldem at infinity for harmonic maps between Carhot Spaces" Proc.Japan Academy. 73Se.A. 168-169 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 板東 重稔: "The existcuce theovem of harmonic objects via Green function" Proceedings of the Pacific Rim Geometry conference 12発表予定. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 芥川 和雄: "Harmonic maps between hyperbolic spaces" Sugagu Expositions (AMS). (発表予定). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 芥川 和雄: "Kenmotsu-Bryaut type,represeutation formula for CMC space like surfaces in H^3_1(-C^2)" Diff.Geom.its Appl. (発表予定). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 中川 泰宏: "Combinatorial formulae for Futaki charactecrs and geweraliced killing forms on toric Fono orbifolds" Proceedings of the Pacific Rim Geometry Confereuae. (発表予定). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 井関 裕靖: "G.Besson,G.Courtois,S.GallotによるMostowの剛性定理の新証明" 数学. 49. 200-211 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 井関 裕靖: "The Teichmiillen distauce on the space of flat conformal structures" Conformal Geometry and Dynamical Systems. 2. 1-24 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 西川 青季: "幾何学的変分問題" 岩波書店, 220 (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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