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2020 Fiscal Year Annual Research Report

Study on geometric structures of singularities of the mean curvature type flow

Research Project

Project/Area Number 16H03937
Research InstitutionFukuoka University

Principal Investigator

成 慶明  福岡大学, 理学部, 教授 (50274577)

Co-Investigator(Kenkyū-buntansha) 山田 光太郎  東京工業大学, 理学院, 教授 (10221657)
納谷 信  名古屋大学, 多元数理科学研究科, 教授 (70222180)
塩谷 隆  東北大学, 理学研究科, 教授 (90235507)
Project Period (FY) 2016-04-01 – 2021-03-31
Keywords平均曲率フロー / 特異点 / 最大値原理 / リーマン多様体 / 部分多様体
Outline of Annual Research Achievements

本研究目的(a):平均曲率フローに現れる特異点の幾何構造に関する研究について、研究代表者と研究協力者華南師範大学のWei Guoxin教授等と共同で4次元Euclid空間内の第2基本形式の長さが一定となる完備セルフーシュリンカーの分類に関する研究を行い、主曲率4乗の和が一定となる4次元Euclid空間内の第2基本形式の長さが一定で完備セルフーシュリンカーを完全に分類した。さらに、研究代表者と研究協力者Wei Guoxin教授及び矢野氏と共同でEuclid空間内のn次元完備セルフーシュリンカーの第2基本形式の長さの第2ギャップに関する研究を行い、重要な進展を得た。研究代表者と研究協力者Wei Guoxin教授及び堀氏と共同で4次元Euclid空間内の第2基本形式の長さが一定で2次元完備ラグランジュセルフーシュリンカーを完全に分類した。
研究目的(b):重み付き体積保存平均曲率フローのλ-超曲面の構成とその分類に関する研究について、研究代表者と研究協力者Wei Guoxin教授は埋め込みコンパクトλ-超曲面を具体的に構成することを成功した。研究代表者と研究協力者Wei Guoxin教授は広義最大値原理を用いて、第2基本形式の長さが一定で重み付き体積保存平均曲率フローの完備λ-曲面を完全に分類した。
研究分担者納谷は明工氏と共同で長さ付き有限グラフのラプラシアン第1固有値の最大化問題について研究を行い、埋め込み最適化問題について大きな進展を与えた。
研究分担者塩谷と藤原氏とは共同で完備非コンパクトなリーマン多様体の体積が有限かつ断面曲率が負で-1以上となっているとき、そのエンドについて、ある種の例を構成した。そのようなエンドがどのような位相型をもつかは大きな問題であるが、本研究では、任意のフリップ・グラフ多様体がそのようなエンドに現れることを証明した。

Research Progress Status

令和2年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和2年度が最終年度であるため、記入しない。

  • Research Products

    (31 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (9 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 9 results) Presentation (19 results) (of which Int'l Joint Research: 15 results,  Invited: 18 results) Remarks (1 results) Funded Workshop (1 results)

  • [Int'l Joint Research] 華南師範大学(中国)

    • Country Name
      CHINA
    • Counterpart Institution
      華南師範大学
  • [Journal Article] Complete self-shrinkers with constant norm of the second fundamental form2022

    • Author(s)
      Qing-Ming Cheng, Z. Li and G. Wei
    • Journal Title

      Math. Z.

      Volume: 300 Pages: 995-1018

    • DOI

      10.1007/s00209-021-02831-6

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Complete Lagrangian self-shrinkers in R^42022

    • Author(s)
      Qing-Ming Cheng, H. Hori and G. Wei
    • Journal Title

      Math. Z.

      Volume: 301 Pages: 3417-3468

    • DOI

      10.1007/s00209-022-03027-2

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Stability and area growth of lambda-hypersurfaces2022

    • Author(s)
      Qing-Ming Cheng and G. Wei
    • Journal Title

      Comm. Analy. Geom.

      Volume: 30 Pages: 1059-1091

    • DOI

      10.4310/CAG.2022.v30.n5.a4

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Examples of compact λ-hypersurfaces in Euclidean spaces2021

    • Author(s)
      Qing-Ming Cheng and G. Wei
    • Journal Title

      Sci. Sin. Math.

      Volume: 48 Pages: 155-166

    • DOI

      10.1360/N012017-00205

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Complete λ-surfaces in R^32021

    • Author(s)
      Qing-Ming Cheng and G. Wei
    • Journal Title

      Calculus of Variations and PDEs

      Volume: 60 Pages: Art 46:1-19

    • DOI

      10.1007/ s00526-021-01920-y

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Area of minimal hypersurfaces in the unit sphere2021

    • Author(s)
      Qing-Ming Cheng, G. Wei and Y. Zheng
    • Journal Title

      Asian J. Math.

      Volume: 25 Pages: 183-194

    • DOI

      10.4310/AJM.2021.v25.n2.a2

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Complete self-shrinkers of mean curvature flow2020

    • Author(s)
      Qing-Ming Cheng and G. Wei
    • Journal Title

      Proceedings of ICCM 2018

      Volume: 1 Pages: 179-196

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Graph manifolds as ends of negatively curved Riemannian manifolds2020

    • Author(s)
      K. Fujiwara and Takashi Shioya
    • Journal Title

      Geom. Topol.

      Volume: 24 Pages: 2035-2074

    • DOI

      10.2140/gt.2020.24.2035

    • Peer Reviewed
  • [Journal Article] Improvement of the Bernstein-type theorem for space-like zero mean curvature graphs in Lorentz- Minkowski space using fluid mechanical duality2020

    • Author(s)
      S. Akamine, M. Umehara and Kotaro Yamada
    • Journal Title

      Proc. Amer. Math. Soc. Ser. B

      Volume: 7 Pages: 17-27

    • DOI

      10.1090/bproc/44

    • Peer Reviewed
  • [Presentation] Singularities of mean curvature flow2023

    • Author(s)
      Qing-Ming Cheng
    • Organizer
      The 13th MSJ-SI "Differential Geometry and Integrable Systems", Osaka City University, Osaka
    • Int'l Joint Research / Invited
  • [Presentation] Complete self-shrinkers of mean curvature flow2023

    • Author(s)
      Qing-Ming Cheng
    • Organizer
      Perspectives in Geometric Analysis, Taiwan University, Taipei
    • Int'l Joint Research / Invited
  • [Presentation] A classification of complete self-shrinkers2022

    • Author(s)
      Qing-Ming Cheng
    • Organizer
      Seminar on differential geometry in Tsinghua University, Beijing, China
    • Int'l Joint Research / Invited
  • [Presentation] Complete self-shrinkers in R^{n+1}2022

    • Author(s)
      Qing-Ming Cheng
    • Organizer
      Seminar on differential geometry in Xiamen University, Xiamen, China
    • Int'l Joint Research / Invited
  • [Presentation] A classification of complete self-shrinkers2021

    • Author(s)
      Qing-Ming Cheng
    • Organizer
      Workshop on differential geometry and non-linear pdes, orthwestern Polytechnic University
    • Int'l Joint Research / Invited
  • [Presentation] 曲小超曲面に関するChernの問題について2021

    • Author(s)
      成 慶明
    • Organizer
      第68回 幾何学シン ポジウム, 北海道大学
    • Invited
  • [Presentation] Complete self-shrinkers of mean curvature flow2021

    • Author(s)
      Qing-Ming Cheng
    • Organizer
      The 23rd International Differential Geometry Workshop on Submanifolds in Homogeneous Spaces & Related Topics, Japan and Korea
    • Int'l Joint Research / Invited
  • [Presentation] Chern problems on compact minimal hypersurfaces2021

    • Author(s)
      Qing-Ming Cheng
    • Organizer
      Seminar on differential geometry in Nankai University, Tianjin, China
    • Int'l Joint Research / Invited
  • [Presentation] Complete self-shrinkers with constant squared norm of second fundamental form2021

    • Author(s)
      Qing-Ming Cheng
    • Organizer
      Seminar on differential geometry in Jiangxi Normal University, Nanchang, China
    • Int'l Joint Research / Invited
  • [Presentation] Complete self-shrinkers in R^42021

    • Author(s)
      Qing-Ming Cheng
    • Organizer
      International conference on canonical metrics and nonlinear PDEs in geometry, Wuhan University, Wuhan, China
    • Int'l Joint Research / Invited
  • [Presentation] Compact minimal hypersurfaces in S^5(1)2021

    • Author(s)
      Qing-Ming Cheng
    • Organizer
      International Workshop on Geometric Evolution Equations, Osaka City University, Osaka
    • Int'l Joint Research / Invited
  • [Presentation] Minimal hypersurfaces with constant scalar curvature2021

    • Author(s)
      Qing-Ming Cheng
    • Organizer
      Seminar on differential geometry in Henan Normal University, Xinxiang, China
    • Int'l Joint Research / Invited
  • [Presentation] First-eigenvalue maximization and embedding optimization2021

    • Author(s)
      Shin Nayatani
    • Organizer
      The 3rd Japan-Taiwan Joint Conference on Differential Geometry, Taiwan University and Osaka City University
    • Int'l Joint Research / Invited
  • [Presentation] First-eigenvalue maximization and embedding optimization2021

    • Author(s)
      Shin Nayatani
    • Organizer
      The 6th China-Japan Geometry Conference, Chongqing University of Technology and Osaka City University
    • Int'l Joint Research / Invited
  • [Presentation] Chern problems on minimal hypersurfaces2020

    • Author(s)
      Qing-Ming Cheng
    • Organizer
      The conference on spectral geometry, Fudan University, Shanghai, China
    • Int'l Joint Research / Invited
  • [Presentation] 有限グラフの埋め込み不変量の最小化と第1固有値の最大化2020

    • Author(s)
      納谷 信
    • Organizer
      日本数学会秋季総合分科会
  • [Presentation] Ellipsoids converge to Gaussian spaces2020

    • Author(s)
      Takashi Shioya
    • Organizer
      Geometric Measure Theory and Geometric Analysis in Moscow
    • Int'l Joint Research / Invited
  • [Presentation] Graph manifolds as ends of negatively curved Riemannian manifolds2020

    • Author(s)
      塩谷 隆
    • Organizer
      第66回幾何学シンポジウム, オンライン
    • Invited
  • [Presentation] 特異点および時空内の零平均曲率曲面の幾何学2020

    • Author(s)
      山田 光太郎
    • Organizer
      日本数学会秋季総合分科会・総合講演
    • Invited
  • [Remarks] Cheng Qing-Ming Homepage

    • URL

      http://www.cis.fukuoka-u.ac.jp/~cheng/

  • [Funded Workshop] The 6th Japan China Geometry Conference2021

URL: 

Published: 2023-12-25  

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