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2021 Fiscal Year Annual Research Report

Multifaceted studies on dynamical problems in the calculus of variations using geometric measure theory

Research Project

Project/Area Number 18H03670
Research InstitutionTokyo Institute of Technology

Principal Investigator

利根川 吉廣  東京工業大学, 理学院, 教授 (80296748)

Co-Investigator(Kenkyū-buntansha) 高坂 良史  神戸大学, 海事科学研究科, 教授 (00360967)
石井 克幸  神戸大学, 海事科学研究科, 教授 (40232227)
三浦 達哉  東京工業大学, 理学院, 准教授 (40838744)
高棹 圭介  京都大学, 理学研究科, 准教授 (50734472)
可香谷 隆  九州大学, マス・フォア・インダストリ研究所, 助教 (60814431)
小野寺 有紹  東京工業大学, 理学院, 准教授 (70614999)
Project Period (FY) 2018-04-01 – 2023-03-31
KeywordsMean curvature flow / Calculus of variations / Geometric measure theory / Minimal surface / Geometric analysis
Outline of Annual Research Achievements

主な研究成果として次の2つを挙げる.
1.Brian Krummel(メルボルン大学)と共同で,一次元ブラッケ流の3重点周りの2回微分可能 性について検討し,少なくとも空間2回微分および時間1回微分が3重点まで有界になることがわかった.これより前の研究として,Wickramasekeraとの共同研究では空間1回微分がヘルダー連続になることを2016年の論文で示していたのだが,今回の研究で2回微分,つまり曲率が3重点まで有界でかつ3重点の動く速度も有界にになることがわかった.
2.Salvatore Stuvard(ミラノ大学)と共同で,以前我々が構成した一次元ブラッケ流の正則性定理について,様々な問題点を検討した.現在まで知られている正則性定理は多重度が1に近い点の近傍における結果で,より一般の2以上の多重度の近傍における正則性定理は知られていない.本質的にはWickramasekeraの安定的な極小曲面の正則性理論のパラボリック版を示さなければならないことがわかってきた.

Current Status of Research Progress
Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

R2年実績報告にもあるように,平均曲率流の弱解の概念について新しい枠組みを与える結果が出ており,すでに計画以上の進展を表すものである.

Strategy for Future Research Activity

R2年実績報告にもあるように,パラボリックの問題に特有な最終時間までの正則性理論の確立が必要であることがわかってきたため.この点の解明について今後集中的に取り組む予定である.

  • Research Products

    (36 results)

All 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (27 results) (of which Int'l Joint Research: 8 results,  Invited: 26 results) Remarks (1 results)

  • [Int'l Joint Research] University of Milan(イタリア)

    • Country Name
      ITALY
    • Counterpart Institution
      University of Milan
  • [Journal Article] Backus problem in geophysics: a resolution near the dipole in fractional Sobolev spaces2022

    • Author(s)
      Toru Kan, Rolando Magnanini and Michiaki Onodera
    • Journal Title

      Nonlinear Differential Equations and Applications NoDEA

      Volume: 29, Art.21 Pages: 1~29

    • DOI

      10.1007/s00030-022-00749-4

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Geometric inequalities involving mean curvature for closed surfaces2021

    • Author(s)
      Tatsuya Miura
    • Journal Title

      Selecta Mathematica

      Volume: 27, Art.80 Pages: 1~24

    • DOI

      10.1007/s00029-021-00696-5

    • Peer Reviewed
  • [Journal Article] A curve shortening equation with time-dependent mobility related to grain boundary motions2021

    • Author(s)
      Masashi Mizuno and Keisuke Takasao
    • Journal Title

      Interfaces and Free Boundaries

      Volume: 23 Pages: 169~190

    • DOI

      10.4171/IFB/453

    • Peer Reviewed
  • [Journal Article] On Obstacle Problem for Brakke's Mean Curvature Flow2021

    • Author(s)
      Keisuke Takasao
    • Journal Title

      SIAM Journal on Mathematical Analysis

      Volume: 53 Pages: 6355~6369

    • DOI

      10.1137/21M1400432

    • Peer Reviewed / Open Access
  • [Journal Article] Singular Neumann Boundary Problems for a Class of Fully Nonlinear Parabolic Equations in One Dimension2021

    • Author(s)
      Takashi Kagaya and Qing Liu
    • Journal Title

      SIAM Journal on Mathematical Analysis

      Volume: 53 Pages: 4350~4385

    • DOI

      10.1137/20m1371646

    • Peer Reviewed / Open Access
  • [Journal Article] Stability analysis of an overdetermined fourth order boundary value problem via an integral identity2021

    • Author(s)
      Yuya Okamoto and Michiaki Onodera
    • Journal Title

      Journal of Differential Equations

      Volume: 301 Pages: 97~111

    • DOI

      10.1016/j.jde.2021.08.017

    • Peer Reviewed
  • [Journal Article] Linear stability estimates for Serrin’s problem via a modified implicit function theorem2021

    • Author(s)
      Alexandra Gilsbach and Michiaki Onodera
    • Journal Title

      Calculus of Variations and Partial Differential Equations

      Volume: 60, Art.241 Pages: 1~19

    • DOI

      10.1007/s00526-021-02107-1

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Existence of canonical multi-phase mean curvature flow2022

    • Author(s)
      Yoshihiro Tonegawa
    • Organizer
      Recent Developments in Geometric Measure Theory and its Applications, Houston, USA (Zoom)
    • Int'l Joint Research / Invited
  • [Presentation] 軸対称曲面に対する Topping 予想の証明2022

    • Author(s)
      三浦達哉
    • Organizer
      第11回室蘭非線形解析研究会,室蘭工業大学 (オンライン)
    • Invited
  • [Presentation] Singular Neumann boundary problems for a class of fully nonlinear parabolic equations2022

    • Author(s)
      可香谷隆
    • Organizer
      第39回九州における偏微分方程式研究集会
    • Invited
  • [Presentation] Singular Neumann boundary problems for a class of fully nonlinear parabolic equations2022

    • Author(s)
      可香谷隆
    • Organizer
      第23回北東数学解析研究会
    • Int'l Joint Research / Invited
  • [Presentation] 一般化された平均曲率流の存在定理について2021

    • Author(s)
      利根川吉廣
    • Organizer
      早稲田大学応用解析研究会
    • Invited
  • [Presentation] Existence of canonical multi-phase mean curvature flows2021

    • Author(s)
      Yoshihiro Tonegawa
    • Organizer
      New Trends in Geometric PDEs, Munster, Germany (Zoom)
    • Int'l Joint Research / Invited
  • [Presentation] Existence of canonical multi-phase mean curvature flows2021

    • Author(s)
      Yoshihiro Tonegawa
    • Organizer
      Singularity Formation in Nonlinear PDEs, Banff International Research Station, Canada (Zoom)
    • Int'l Joint Research / Invited
  • [Presentation] Generalized mean curvature flow2021

    • Author(s)
      Yoshihiro Tonegawa
    • Organizer
      15th International Conference on Free Boundary Problems, Berlin, Germany (Zoom)
    • Int'l Joint Research / Invited
  • [Presentation] On the Brakke flows starting from minimal hypersurfaces with flat singularities2021

    • Author(s)
      Yoshihiro Tonegawa
    • Organizer
      NCTS Differential Geometry Seminar, National Taiwan Normal Univ (WebEx)
    • Int'l Joint Research / Invited
  • [Presentation] Topping の直径予想について2021

    • Author(s)
      三浦達哉
    • Organizer
      東工大幾何セミナー,東京工業大学
    • Invited
  • [Presentation] 曲がる物体の数学解析2021

    • Author(s)
      三浦達哉
    • Organizer
      ロボティクス・メカトロニクス 講演会 2021 in Osaka (オンライン)
    • Invited
  • [Presentation] 曲線の曲げエネルギーと自己交叉2021

    • Author(s)
      三浦達哉
    • Organizer
      筑波大学微分幾何学セミナー,筑波大学(オンライン)
    • Invited
  • [Presentation] Li-Yau type inequality for curves and applications2021

    • Author(s)
      三浦達哉
    • Organizer
      解析学火曜セミナー,東京大学(オンライン)
    • Invited
  • [Presentation] Li-Yau type inequality for curves and applications2021

    • Author(s)
      Tatsuya Miura
    • Organizer
      Asia-Pacific Analysis and PDE Seminar (Online)
    • Int'l Joint Research / Invited
  • [Presentation] Variational analysis of self-intersecting elastic curves2021

    • Author(s)
      Tatsuya Miura
    • Organizer
      15th International Conference on Free Boundary Problems (Online)
    • Int'l Joint Research / Invited
  • [Presentation] Optimal thresholds for preserving embeddedness of elastic flows2021

    • Author(s)
      三浦達哉
    • Organizer
      RIMS研究集会(公開型)「発展方程式の広がり: 理論的基礎から実践的応用まで」
    • Invited
  • [Presentation] Li-Yau type inequality for curves and applications2021

    • Author(s)
      三浦達哉
    • Organizer
      東北大学 応用数理解析セミナー
    • Invited
  • [Presentation] A diameter bound for compact surfaces and the Plateau-Douglas problem2021

    • Author(s)
      三浦達哉
    • Organizer
      楕円型・放物型微分方程式研究集会 2021,龍谷大学
    • Invited
  • [Presentation] Variational analysis of self-intersecting elastic curves2021

    • Author(s)
      三浦達哉
    • Organizer
      微分方程式の総合的研究,東京大学 (オンライン)
    • Invited
  • [Presentation] ある非局所項付きAllen-Cahn方程式を用いた体積保存平均曲率流の存在について2021

    • Author(s)
      高棹圭介
    • Organizer
      九州関数方程式セミナー
    • Invited
  • [Presentation] Singular Neumann boundary problems for a class of fully nonlinear parabolic equations in one dimension2021

    • Author(s)
      可香谷隆,柳青
    • Organizer
      熊本大学応用解析セミナー
    • Invited
  • [Presentation] 発散型ノイマン境界条件付き完全非線形放物型方程式の可解性及び漸近挙動について2021

    • Author(s)
      可香谷隆
    • Organizer
      日本数学会2021年度秋季総合分科会
  • [Presentation] Singular Neumann boundary problem for power type curvature flow2021

    • Author(s)
      可香谷隆
    • Organizer
      NLPDEセミナー
    • Invited
  • [Presentation] 発散型ノイマン境界条件付き完全非線形放物型方程式に対する有界な解の可解性2021

    • Author(s)
      可香谷隆
    • Organizer
      数理解析若手研究会
    • Invited
  • [Presentation] 接触角条件付き面積保存型曲率流の漸近挙動解析2021

    • Author(s)
      可香谷隆
    • Organizer
      室蘭工業大学談話会
    • Invited
  • [Presentation] Singular Neumann boundary problems for a class of fully nonlinear parabolic equations2021

    • Author(s)
      可香谷隆
    • Organizer
      微分方程式の総合的研究
    • Invited
  • [Presentation] Bernoulliの自由境界問題の解の葉層構造2021

    • Author(s)
      小野寺有紹
    • Organizer
      One-day workshop on Applied and Computational Complex Analysis
    • Invited
  • [Remarks] 利根川吉廣研究室ホームページ

    • URL

      https://www.math.titech.ac.jp/~tonegawa/toppagejp.htm

URL: 

Published: 2023-12-25  

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