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2015 Fiscal Year Annual Research Report

低次元多様体モジュライ空間の新展開

Research Project

Project/Area Number 24340009
Research InstitutionGakushuin University

Principal Investigator

山田 澄生  学習院大学, 理学部, 教授 (90396416)

Co-Investigator(Kenkyū-buntansha) 大鹿 健一  大阪大学, 理学(系)研究科(研究院), 教授 (70183225)
山口 孝男  京都大学, 理学(系)研究科(研究院), 教授 (00182444)
Project Period (FY) 2012-04-01 – 2017-03-31
Keywordsタイヒミュラー空間 / アインシュタイン方程式 / モジュライ空間 / 凸幾何学 / コーシー問題 / ローレンツ幾何学 / 射影幾何学
Outline of Annual Research Achievements

一般相対性理論における宇宙検閲官予想に関連するブラックホールの幾何学に関してAriel大学のGilbert Weinstein氏およびStonybrook大学のMarcus Khuri氏と研究を進めた。その結果、アインシュタイン方程式に内在する漸近的不変量の間に成立するべきペンローズ不等式と呼ばれる関係が成り立たない時空を構成し、論文として発表した。またStrasbourg大学のAthanase Papadopoulos氏と、凸体上で定義されるFunk計量およHilbert 計量の幾何学の定式化および深化を、ユークリッド空間、球面、双曲空間およびタイヒミュラー空間上で行った。とくにタイヒミュラー空間の文脈においては、双曲計量を持つ閉曲面の新たな変形理論を定式化することに成功した。また1960年代に相対性理論に誘発されたH.Busemannによって定義されたTimelike Geometryという距離空間の幾何学をPapadopoulos氏と共に凸体の外的領域に定義されるFunkおよびHilbert型計量として定式化することを達成した。研究分担者(山口)は、境界付きリーマン多様体の崩壊理論(内半径崩壊の場合)、曲がった空間上のフラクタル幾何、アレクサンドロフ空間のリプシッツ・ホモトピー構造、という3つの課題に関して研究を進めた。研究分担者(大鹿)は自由群の指標多様体におけるSchottky空間を初めとする変形空間の位置の研究を行った.またKlein群の発散列を幾何的に実現する問題に取り組んだ.さらにpants複体とWeil-Petersson計量の間の擬等長定数の種数に関する増大度を評価する問題に取り組んだ.これらの研究課題は全て2次元および3次元のリーマン多様体の変形理論の進展につながった。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

共同研究および研究代表個人の研究の双方が複合的に前進している。

Strategy for Future Research Activity

本研究課題の最終年度として、タイヒミュラー空間という2次元計量の変形理論とアインシュタイン方程式という3次元リーマン計量の時間発展の理論のあいだに具体的な相関性を定式化することで、これからの研究の拡がりを自然に誘導する本研究課題の総まとめをおこなう。

Causes of Carryover

平成26年度に計画していた中期の海外(アメリカ)滞在計画が、身内の不幸から中止になり、また平成27年度に招聘を予定していたフランスの研究協力者の来日が今年度に延期されたため、当初の計画から使用額の差異が生じた。

Expenditure Plan for Carryover Budget

今年度、アメリカ中期滞在とフランス人研究者の中期招聘を予定している。

  • Research Products

    (32 results)

All 2016 2015 Other

All Int'l Joint Research (4 results) Journal Article (13 results) (of which Int'l Joint Research: 11 results,  Peer Reviewed: 12 results,  Acknowledgement Compliant: 7 results,  Open Access: 10 results) Presentation (15 results) (of which Int'l Joint Research: 12 results,  Invited: 15 results)

  • [Int'l Joint Research] University of Strasbourg/IRMA, Strasbourg(France)

    • Country Name
      France
    • Counterpart Institution
      University of Strasbourg/IRMA, Strasbourg
  • [Int'l Joint Research] KIAS(韓国)

    • Country Name
      KOREA (REP. OF KOREA)
    • Counterpart Institution
      KIAS
  • [Int'l Joint Research] Ariel University(Israel)

    • Country Name
      Israel
    • Counterpart Institution
      Ariel University
  • [Int'l Joint Research] Stonybrook University/MSRI/Stanford University(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      Stonybrook University/MSRI/Stanford University
  • [Journal Article] Measurable Rigidity for Kleinian groups2016

    • Author(s)
      Woojin Jeon, Ken’ichi Ohshika
    • Journal Title

      Ergodic Theory and Dynamical Systems

      Volume: 36 Pages: 2498, 2511

    • DOI

      10.1017/etds.2015.15

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Proof of the Riemannian Penrose inequality with charge for multiple black holes2016

    • Author(s)
      Marcus Khuri, Gilbert Weinstein, Sumio Yamada
    • Journal Title

      Journal of Differential Geometry

      Volume: 未定 Pages: 未定

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Subgroups of mapping class groups related to Heegaard splittings and bridge decompositions,2016

    • Author(s)
      Ken'ichi Ohshika and M. Sakuma
    • Journal Title

      Geometriae Dedicata

      Volume: 180 Pages: 117, 134

    • DOI

      10.1007/s10711-015-0094-4

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Convergence of freely decomposable Kleinian groups,2016

    • Author(s)
      I. Kim, C. Lecuire and Ken'ichi Ohshika
    • Journal Title

      Inventiones Mathematicae

      Volume: 204 Pages: 81, 131

    • DOI

      10.1007/s00222-015-0609-5

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Null-set compactifications of Teichmuller spaces2016

    • Author(s)
      V. Alberge, H. Miyachi and Ken'ichi
    • Journal Title

      Handbook of Teichmuller theory, (Irma Lectures in Mathematics and Theoretical Physics) European Mathematical Society

      Volume: VI Pages: 71, 94

  • [Journal Article] Conical limit points and the Cannon-Thurston map2016

    • Author(s)
      W.Jeon, C.Leninger, I. Kapovichi and Keni'chi Ohshika
    • Journal Title

      Conformal Geometry and Dynamics

      Volume: 未定 Pages: 未定

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Riemannian Penrose inequality with charge for multiple black holes2015

    • Author(s)
      Marcus Khuri, Gilbert Weinstein, Sumio Yamada
    • Journal Title

      Contemporary Mathematics

      Volume: 653 Pages: 219, 226

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Extensions of the charged Riemannian Penrose inequality2015

    • Author(s)
      Marcus Khuri, Gilbert Weinstein, Sumio Yamada
    • Journal Title

      Classical and Quantum Gravity

      Volume: 32 Pages: 035019

    • DOI

      10.1088/0264-9381/32/3/035019

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Weil-Petersson Funk metric on Teichmueller space2015

    • Author(s)
      Hideki Miyachi, Ken'ichi Ohshika, and Sumio Yamada
    • Journal Title

      Handbook of Hilbert Geometry, European Mathematical Society

      Volume: 1 Pages: 339, 352

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Funk and Hilbert geometries in spaces of constant curvature2015

    • Author(s)
      Athanase Papadopoulos and Sumio Yamada
    • Journal Title

      Handbook of Hilbert Geometry (Irma Lectures in Mathematics and Theoretical Physics) European Mathematical Society

      Volume: 1 Pages: 353, 382

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] On the projective geometry of constant curvature spaces2015

    • Author(s)
      Athanase Papadopoulos and Sumio Yamada
    • Journal Title

      Sophus Lie and Felix Klein : The Erlangen Program and Its Impact in Mathematics and Physics (Irma Lectures in Mathematics and Theoretical Physics) European Mathematical Society

      Volume: 1 Pages: 237, 256

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Geometric limits of Kleinian groups and their applications2015

    • Author(s)
      Ken'ichi Ohshika
    • Journal Title

      Handbook of Group Actions, International Press

      Volume: 2 Pages: 245, 270

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On Klein-Maskit Combination Theorem in space II2015

    • Author(s)
      Liuan Li, Ken'ichi Ohshika and Xiantao Wang
    • Journal Title

      Kodai J. Math.

      Volume: 38 Pages: 1, 22

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Metric geometry on the positive orthant2016

    • Author(s)
      Sumio Yamada
    • Organizer
      French-Japanese workshop on Teichmueller spaces and surface mapping class group
    • Place of Presentation
      University of Strasbourg, France.
    • Year and Date
      2016-06-05
    • Int'l Joint Research / Invited
  • [Presentation] Inradius collapsed manifolds2016

    • Author(s)
      Takao Yamaguchi
    • Organizer
      Riemannian Geometry Seminar
    • Place of Presentation
      MSRI, USA
    • Year and Date
      2016-02-02
    • Int'l Joint Research / Invited
  • [Presentation] On Riemannian Geometry of the Einstein Equation2016

    • Author(s)
      Sumio Yamada
    • Organizer
      CiRfSEワークショップ New Frontiers in Mathematical Physics
    • Place of Presentation
      筑波大学数理物質融合科学センター
    • Year and Date
      2016-01-19
    • Int'l Joint Research / Invited
  • [Presentation] Deformation of right angled hexagons and Thurston/Arc metrics on Teichmueller space.2016

    • Author(s)
      Sumio Yamada
    • Organizer
      Workshop on Teichmueller Theory and Low-Dimensional Topology
    • Place of Presentation
      S.T. Yau Mathematical Sciences Center, 海南島、中国
    • Year and Date
      2016-01-16
    • Int'l Joint Research / Invited
  • [Presentation] アインシュタイン方程式のコーシー問題に関する幾何学的考察2015

    • Author(s)
      Sumio Yamada
    • Organizer
      数学専攻談話会
    • Place of Presentation
      東北大学大学院理学研究科
    • Year and Date
      2015-11-16
    • Invited
  • [Presentation] Deformation spaces of Kleinian groups2015

    • Author(s)
      Ken'ichi Ohshika
    • Organizer
      Topology and Groups
    • Place of Presentation
      University of Goa, India
    • Year and Date
      2015-10-17 – 2015-10-18
    • Int'l Joint Research / Invited
  • [Presentation] Variational aspect of Teichmueller map2015

    • Author(s)
      Sumio Yamada
    • Organizer
      Workshop on Finsler geometry and applications to low-dimensional geometry and topology and moduli spaces
    • Place of Presentation
      University of Cagliari, Cagliari, Italy.
    • Year and Date
      2015-09-21 – 2015-09-24
    • Int'l Joint Research / Invited
  • [Presentation] Teichmuller space; its asymptotic geometry, compactifications, and combinatorial models, ( 3 talks )2015

    • Author(s)
      Ken'ichi Ohshika
    • Organizer
      Finsler geometry and applications to low-dimensional geometry and topology and moduli spaces
    • Place of Presentation
      University of Cagliari, Italy
    • Year and Date
      2015-09-21 – 2015-09-23
    • Int'l Joint Research / Invited
  • [Presentation] Various compactifications of Teichmuller spaces and their relations (3 talks)2015

    • Author(s)
      Ken'ichi Ohshika
    • Organizer
      Geometric structures and related topics
    • Place of Presentation
      KIAS, YangYang, 韓国
    • Year and Date
      2015-08-25 – 2015-08-26
    • Int'l Joint Research / Invited
  • [Presentation] Accumulation of closed 3-manifolds within character varieties2015

    • Author(s)
      Ken'ichi Ohshika
    • Organizer
      Geometric Topology Fair in Korea、A workshop on geometric group theory & low-dimensional topology
    • Place of Presentation
      Gyeonju, K-Hotel, 韓国
    • Year and Date
      2015-08-10
    • Int'l Joint Research / Invited
  • [Presentation] On the moduli space of the Cauchy initial data for the Einstein equation2015

    • Author(s)
      Sumio Yamada
    • Organizer
      Summer School on multiscale and geometric analysis
    • Place of Presentation
      Sapporo International Convention Center, 札幌
    • Year and Date
      2015-07-28
    • Int'l Joint Research / Invited
  • [Presentation] The origin of the notion of manifold2015

    • Author(s)
      Ken'ichi Ohshika
    • Organizer
      Conference "Geometry in History"
    • Place of Presentation
      Universte de Strasbourg, France
    • Year and Date
      2015-06-11
    • Int'l Joint Research / Invited
  • [Presentation] Geography of closed 3-manifolds within character varieties2015

    • Author(s)
      Ken'ichi Ohshika
    • Organizer
      French-Japanese workshop on Teichmuller spaces and surface mapping class groups
    • Place of Presentation
      Universte de Strasbourg, France
    • Year and Date
      2015-06-05
    • Int'l Joint Research / Invited
  • [Presentation] Convex bodies and geometry of some associated Minkowski functionals2015

    • Author(s)
      Sumio Yamada
    • Organizer
      PDE実解析研究会
    • Place of Presentation
      東京大学数理科学研究科
    • Year and Date
      2015-05-19
    • Invited
  • [Presentation] Convex bodies in euclidean, spherical, hyperbolic and moduli spaces2015

    • Author(s)
      Sumio Yamada
    • Organizer
      Differential Equation Seminar
    • Place of Presentation
      Ariel University, Israel
    • Year and Date
      2015-05-06
    • Invited

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Published: 2017-01-06   Modified: 2022-01-31  

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