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2018 Fiscal Year Annual Research Report

Comprehensive study of geometric complex analysis

Research Project

Project/Area Number 15H02057
Research InstitutionThe University of Tokyo

Principal Investigator

平地 健吾  東京大学, 大学院数理科学研究科, 教授 (60218790)

Project Period (FY) 2015-04-01 – 2020-03-31
Keywords多変数函数論 / ツイスター理論 / 特異点論 / CR幾何学 / L2拡張定理 / ケーラー多様体
Outline of Annual Research Achievements

国際会議「多変数複素解析葉山シンポジウム」を拡大し「Pacific Rim Complex/Symplectic Geometry」と共同で開催した。 若手研究者を中心とした「函数論サマー セミナー」,国内の研究成果発表の場として「函数論シンポジウム」および「多変数函数論冬セミナー 」を開催した.東京大学では細野元気氏を世話人として複素解析幾何セミナーをほぼ毎週実施した.
松村慎一は準正値な正則断面曲率を持つ射影多様体が有理連結になることを証明し, Shing-Tung Yauの予想を一般化して解決した.本多宣博はコンパクト代数的ツイスター空間のうち,基本線形系が1次元以上であるものの構造定理を得た.神本丈は特異点論的視点から振動積分や局所ゼータ関数の漸近解析やダンジェロの型の定量的な解析を行った.吉川謙一は偏極エンリケス多様体のモジュライ空間が準アフィンであることを示し,エンリケス曲面に対するボルチャーズΦ関数の一つの高次限化を与えた.大沢健夫はd-bar方程式のL^2解を用いて西野の剛性定理も一般化した.高山茂晴は複素多様体間の平坦射のファイバー積分により得られる関数の特異点の周りでの漸近展開に関する研究を行った.奥間智弘は2次元複素特異点の正規化された節減数について,錐特異点の場合に簡明な上界を与え,斉次超曲面特異点に対して公式を示した.後藤竜司は一般化されたケーラー多様体上の一般化された正則ベクトル束にたいして小林-ヒッチン対応を示した.辻元は標準測度の生成する葉層構造について研究を進め,全空間の小平次元が0以上という条件下で飯高予想が成り立つことを確認した.伊師英之は等質ではないが明示的な計算が可能な指数型分布族を構成した.これに対応するケーラー領域の考察を進めた.平地健吾はCR構造の抽象的な変形の具体的な実現方法を与えベルグマン核の対数項の変分の計算に応用した.

Current Status of Research Progress
Current Status of Research Progress

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

Reason

予定通りに国際会議及び国内向けの研究集会が開催され盛んに研究成果発表と研究者の交流が行われている。各連携研究者の研究も研究実績にあるように滞りなく進ん でいる。

Strategy for Future Research Activity

7月には多変数関数論葉山シンポジウムを(代表:千葉優作)を開催する。9月には 若手研究者の中心とした「函数論サマーセミナー」(代表:足立真訓),冬には国内の研究成果発表の場として「函数論シンポジウム」(代表: 奥間智弘)を開催し当該分野の相互理解をはかる。東京大学では毎週複素解析幾何セミナーを実施し、研究者間の情報の共有をはかる。
連携研究者の研究テーマは以下の通りである:吉川謙一(京都大学・理学研究科・教授)解析的トーションの研究; 高山茂晴(東 京大学・数理学研究科・教授)ベクトル束の特異計量の研究; 大沢健夫(名古屋大学・多元数理科学研究科・名誉教授)L2拡張定理の研究; 辻元( 上智大学・理工学部・教授)ケーラーリッチ流の研究; 本多宣博(東京工業大学・理学研究科・教授)ツイスター空間の研究; 山ノ井克俊(大阪大 学・理学研究科・教授)値分布論の研究; 伊師英之(名古屋大学・多元数理科学研究科・准教授)有界等質領域の研究; 奥間智弘(山形大学・数理 科学科・教授)特異点の不変量の研究; 後藤竜司(大阪大学・理学研究科・教授)一般化されたケーラー構造の研究; 神本丈(九州大学・理学研究 科・准教授)振動積分の漸近解析; 松村慎一(東北大学・理学研究科・准教授)アバンダンス予想の研究

  • Research Products

    (53 results)

All 2019 2018 Other

All Int'l Joint Research (3 results) Journal Article (15 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 14 results) Presentation (32 results) (of which Int'l Joint Research: 14 results,  Invited: 30 results) Book (2 results) Funded Workshop (1 results)

  • [Int'l Joint Research] Warsaw University of Technology(ポーランド)

    • Country Name
      POLAND
    • Counterpart Institution
      Warsaw University of Technology
  • [Int'l Joint Research] Universite d'Angers(フランス)

    • Country Name
      FRANCE
    • Counterpart Institution
      Universite d'Angers
  • [Int'l Joint Research] University of Illinois at Chicago/University of California, San Diego(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      University of Illinois at Chicago/University of California, San Diego
  • [Journal Article] Wishart laws and variance function on homogeneous cones2019

    • Author(s)
      Graczyk Piotr, Kolodziejek Bartosz, Ishi Hideyuki
    • Journal Title

      Probability and Mathematical Statistics

      Volume: 掲載決定 Pages: 掲載決定

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Characterization of the Riesz Exponential Family on homogeneous cones2019

    • Author(s)
      Kolodziejek Bartosz and Ishi Hideyuki
    • Journal Title

      Colloquium Mathematicum

      Volume: 掲載決定 Pages: 掲載決定

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Scalar curvature as moment map in generalized Kaehler geometry2019

    • Author(s)
      Goto Ryushi
    • Journal Title

      The Journal of Symplectic Geometry

      Volume: 掲載決定 Pages: 掲載決定

    • Peer Reviewed
  • [Journal Article] Normal Reduction Numbers for Normal Surface Singularities with Application to Elliptic Singularities of Brieskorn Type2019

    • Author(s)
      Okuma Tomohiro、Watanabe Kei-ichi、Yoshida Ken-ichi
    • Journal Title

      Acta Mathematica Vietnamica

      Volume: 44 Pages: 87~100

    • DOI

      10.1007/s40306-018-00311-4

    • Peer Reviewed
  • [Journal Article] A transcendental approach to injectivity theorem for log canonical pairs2019

    • Author(s)
      Matsumura Sin-ichi
    • Journal Title

      The Annali della Scuola Normale Superiore di Pisa, Classe di Scienze

      Volume: 掲載決定 Pages: 掲載決定

    • Peer Reviewed
  • [Journal Article] Non-polar singularity of local zeta functions in some smooth case2019

    • Author(s)
      Kamimoto Joe and Nose Toshihiro
    • Journal Title

      Trans. Amer. Math. Soc.

      Volume: 掲載決定 Pages: 掲載決定

    • Peer Reviewed
  • [Journal Article] A sufficient condition for equality of regular type and singular type on real hypersurfaces2019

    • Author(s)
      Kamimoto Joe
    • Journal Title

      京都大学数理解析研究所講究録

      Volume: 掲載決定 Pages: 掲載決定

  • [Journal Article] L^2 proof of Nishino's rigidity theorem2019

    • Author(s)
      Ohsawa Takeo
    • Journal Title

      Kyoto J. Math.

      Volume: 掲載決定 Pages: 掲載決定

    • Peer Reviewed
  • [Journal Article] A role of the L^2 method in analytic families2019

    • Author(s)
      Ohsawa Takeo
    • Journal Title

      The proceedings of the conference to the memory of Ohkawa

      Volume: 掲載決定 Pages: 掲載決定

    • Peer Reviewed
  • [Journal Article] A survey on the L^2 extension theorems2019

    • Author(s)
      Ohsawa Takeo
    • Journal Title

      Journal of Geometric Analysis

      Volume: 掲載決定 Pages: 掲載決定

    • Peer Reviewed
  • [Journal Article] A filling-in problem and moderate degenerations of minimal algebraic varieties2019

    • Author(s)
      Takayama Shigeharu
    • Journal Title

      Algebraic Geometry

      Volume: 6 Pages: 26~49

    • DOI

      10.14231/AG-2019-002

    • Peer Reviewed
  • [Journal Article] Doubly Autoparallel Structure on the Probability Simplex2018

    • Author(s)
      Ohara Atsumi、Ishi Hideyuki
    • Journal Title

      Springer Proceedings in Mathematics and Statistics

      Volume: 252 Pages: 323~334

    • DOI

      10.1007/978-3-319-97798-0_12

    • Peer Reviewed
  • [Journal Article] Positivity of twisted relative pluricanonical bundles and their direct images2018

    • Author(s)
      Paun Mihai、Takayama Shigeharu
    • Journal Title

      Journal of Algebraic Geometry

      Volume: 27 Pages: 211~272

    • DOI

      https://doi.org/10.1090/jag/702

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] An injectivity theorem with multiplier ideal sheaves of singular metrics with transcendental singularities2018

    • Author(s)
      Matsumura Shin-ichi
    • Journal Title

      Journal of Algebraic Geometry

      Volume: 27 Pages: 305~337

    • DOI

      https://doi.org/10.1090/jag/687

    • Peer Reviewed
  • [Journal Article] Resultants and the Borcherds Φ-Function2018

    • Author(s)
      Kawaguchi Shu、Mukai Shigeru、Yoshikawa Ken-Ichi
    • Journal Title

      American Journal of Mathematics

      Volume: 140 Pages: 1471~1519

    • DOI

      10.1353/ajm.2018.0045

    • Peer Reviewed
  • [Presentation] On projective manifolds with semi-positive holomorphic sectional curvature2019

    • Author(s)
      Sin-ichi Matsumura
    • Organizer
      The 14th Algebraic-Analytic-Geometry seminar 鹿児島大学
    • Int'l Joint Research / Invited
  • [Presentation] Twistors, quartics, and del Pezzo Fibrations2019

    • Author(s)
      Nobuhiro Honda
    • Organizer
      Workshop on Global Aspects of Projective and Kaehler Geometry, Tsinghua Sanya International Mathematics Forum, China
    • Int'l Joint Research / Invited
  • [Presentation] ニュートン多面体と振動積分の漸近解析 I,II2019

    • Author(s)
      神本 丈
    • Organizer
      筑波RCMS解析学シンポジウム
    • Invited
  • [Presentation] Enriques 2n-folds and analytic torsion2019

    • Author(s)
      Ken-Ichi Yoshikawa
    • Organizer
      Discussion Meeting on Bundle 2019, Tata Institute of Fundamental Research, Mumbai, India
    • Int'l Joint Research / Invited
  • [Presentation] Splitting theorems on complete Kaehler manifolds by the L^2 method2019

    • Author(s)
      Takeo Ohsawa
    • Organizer
      1147th AMS meeting March 22, 2019 University of Hawaii at Manoa (USA).
    • Int'l Joint Research / Invited
  • [Presentation] Weighted homogeneous surface singularities homeomorphic to Brieskorn complete intersections2019

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会年会函数論分科会, 東京工業大学
  • [Presentation] On homogeneous exponential family2019

    • Author(s)
      Hideyuki Ishi
    • Organizer
      第18回名古屋国際数学コンファレンス「Information Geometry and Affine Differential Geometry III」
    • Int'l Joint Research / Invited
  • [Presentation] Relative fundamental solution to the CR invariant powers of sub-Laplacian and the deformation complex of CR structures,2019

    • Author(s)
      Kengo Hirachi
    • Organizer
      Taipei Conference on Geometric Invariance and Partial Differential Equations, Institute of Mathematics, Academia Sinica (Taiwan),
    • Int'l Joint Research / Invited
  • [Presentation] Global invariants of strictly pseudoconvex domains,2019

    • Author(s)
      Kengo Hirachi
    • Organizer
      Mathematics Colloquium, UCSD (USA),
    • Invited
  • [Presentation] On morphisms of compact Kaehler manifolds with semi-positive holomorphic sectional curvature2018

    • Author(s)
      Sin-ichi Matsumura
    • Organizer
      東京大学 複素解析幾何セミナー
    • Invited
  • [Presentation] On projective manifolds with semi-positive holomorphic sectional curvature2018

    • Author(s)
      Sin-ichi Matsumura
    • Organizer
      大阪市立大学 微分幾何セミナー
    • Invited
  • [Presentation] On the image of MRC fibrations of projective manifolds with semi-positive holomorphic sectional curvature2018

    • Author(s)
      Sin-ichi Matsumura
    • Organizer
      Seminar of Differential Geometry, Chinese Academy of Sciences (Beijing)
    • Invited
  • [Presentation] Projective klt pairs with nef anti-canonical divisor and rationally connected fibrations2018

    • Author(s)
      Sin-ichi Matsumura
    • Organizer
      Seminar of Algebraic Geometry, Chinese Academy of Sciences (Beijing)
    • Invited
  • [Presentation] Projective klt pairs with nef anti-canonical divisor and rationally connected fibrations2018

    • Author(s)
      Sin-ichi Matsumura
    • Organizer
      Workshop on stabilities in Kaehler geometry and related topic 東北大学
    • Int'l Joint Research / Invited
  • [Presentation] Projective klt pairs with nef anti-canonical divisor and rationally connected fibrations2018

    • Author(s)
      Sin-ichi Matsumura
    • Organizer
      東北大学 代数幾何セミナー, 東北大学
    • Invited
  • [Presentation] Twistor spaces, Del Pezzo fibrations, and quartic hypersurfaces2018

    • Author(s)
      Nobuhiro Honda
    • Organizer
      Cohomology of Complex Manifolds and Special Structures, Levico Terme (Trento), Italy
    • Int'l Joint Research / Invited
  • [Presentation] Twistors, quartics, and del Pezzo fibrations2018

    • Author(s)
      Nobuhiro Honda
    • Organizer
      The 24th Symposium on Complex Geometry 石川県政記念 しいのき迎賓館
    • Invited
  • [Presentation] Twistor spaces, Del Pezzo fibrations, and quartic hypersurfaces2018

    • Author(s)
      本多宣博
    • Organizer
      中央大学 幾何・トポロジーセミナー
    • Invited
  • [Presentation] Regular and singular orders of contact on real hypersurfaces2018

    • Author(s)
      神本 丈
    • Organizer
      第53回函数論サマーセミナー,福岡県北九州市
    • Invited
  • [Presentation] Non-polar singularities of local zeta functions in some smooth case2018

    • Author(s)
      神本 丈
    • Organizer
      日本数学会2018年度秋季総合分科会,岡山大学
  • [Presentation] Regular and singular orders of contact on real hypersurfaces2018

    • Author(s)
      神本 丈
    • Organizer
      代数解析学の諸問題--超局所解析及び漸近解析-- 京大数理解析研
    • Invited
  • [Presentation] ニュートン多面体と重みつき振動積分2018

    • Author(s)
      神本 丈
    • Organizer
      第228回 広島数理解析セミナー,広島大学
    • Invited
  • [Presentation] Newton polyhedra and order of contact on real hypersurfaces2018

    • Author(s)
      神本 丈
    • Organizer
      複素解析幾何セミナー,東京大学
    • Invited
  • [Presentation] Enriques 2n-folds and analytic torsion2018

    • Author(s)
      Ken-Ichi Yoshikawa
    • Organizer
      Intercity Seminar in Arakelov Geometry 2018, Copenhagen University, Copenhagen, Denmark
    • Int'l Joint Research / Invited
  • [Presentation] L^2 proof of Nishino's rigidity theorem2018

    • Author(s)
      Takeo Ohsawa
    • Organizer
      CR geometry and PDE's VIII, Levico Terme (Italy).
    • Int'l Joint Research / Invited
  • [Presentation] Degeneration of Kaehler-Einstein manifolds2018

    • Author(s)
      Shigeharu Takayama
    • Organizer
      2018 International conference on complex geometry and several complex variables, Chinese Academy of Sciences, 中国(北京).
    • Int'l Joint Research / Invited
  • [Presentation] Scalar curvature as moment map in generalized Kaehler geometry2018

    • Author(s)
      Ryushi Goto
    • Organizer
      Cohomology of Complex Manifolds and Special Structures, Levico Terme (Trento), イタリア
    • Int'l Joint Research / Invited
  • [Presentation] Einstein-Hermitian vector bundles over generalized Kaehler manifolds2018

    • Author(s)
      Ryushi Goto
    • Organizer
      The 24th Symposium on Complex Geometry , 金沢
    • Int'l Joint Research / Invited
  • [Presentation] Einstein-Hermitian vector bundles over generalized Kaehler manifolds2018

    • Author(s)
      Ryushi Goto
    • Organizer
      第4回日中幾何学研究集会Hefei, China
    • Int'l Joint Research / Invited
  • [Presentation] Discretization of Kaehler-Ricci flows2018

    • Author(s)
      辻 元
    • Organizer
      複素幾何シンポジウム 金沢
    • Invited
  • [Presentation] Invariant measures in complex geometry2018

    • Author(s)
      辻 元
    • Organizer
      岡シンポジウム 奈良女子大
    • Invited
  • [Presentation] Monge-Ampere foliations associated with canonical measure2018

    • Author(s)
      辻 元
    • Organizer
      多変数関数論冬セミナー 大阪市大
    • Invited
  • [Book] L^2 approaches in several complex variables---towards the Oka-Cartan theory with precise bounds2018

    • Author(s)
      Ohsawa Takeo
    • Total Pages
      258+xi
    • Publisher
      Springer
  • [Book] 多変数複素解析(増補版)2018

    • Author(s)
      大沢健夫
    • Total Pages
      166
    • Publisher
      岩波書店
  • [Funded Workshop] HAYAMA Symposium on Complex Analysis in Several Variables XX & Pacific Rim Complex-Symplectic Geometry Conference2018

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Published: 2019-12-27  

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