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2017 Fiscal Year Annual Research Report

複雑領域のポテンシャル解析の深化―非線形PDEと理想境界への応用

Research Project

Project/Area Number 17H01092
Research InstitutionHokkaido University

Principal Investigator

相川 弘明  北海道大学, 理学研究院, 教授 (20137889)

Co-Investigator(Kenkyū-buntansha) 正宗 淳  北海道大学, 理学研究院, 教授 (50706538)
木上 淳  京都大学, 情報学研究科, 教授 (90202035)
加須栄 篤  金沢大学, 数物科学系, 教授 (40152657)
利根川 吉廣  東京工業大学, 理学院, 教授 (80296748)
倉田 和浩  首都大学東京, 理工学研究科, 教授 (10186489)
志賀 啓成  東京工業大学, 理学院, 教授 (10154189)
須川 敏幸  東北大学, 情報科学研究科, 教授 (30235858)
平田 賢太郎  広島大学, 理学研究科, 准教授 (30399795)
野瀬 敏洋  福岡工業大学, 工学部, 助教 (90637993)
Project Period (FY) 2017-04-01 – 2021-03-31
Keywordsポテンシャル / 容量 / 調和 / 距離空間 / 平均曲率流 / 熱核 / 非線形変分問題 / ネットワーク
Outline of Annual Research Achievements

半径一定の容量密度平均の下限を考え,半径が大きくなったときの極限が0か1しかないことを距離測度空間に対して示した.Lipschitz領域やJohn領域をベースにもつシリンダー上の熱方程式の正値優解の境界にいたるまでの大域的可積分性を様々な角度から導いた.非コンパクト多様体上のキリング項を持つ拡散方程式に対して「一般化された熱の保存則」を提唱して,多様体が一般化された熱の保存則を満たすための必要十分条件を対応する作用素のリュービル性で与えた.距離空間の partition とその上の weight function の理論の応用の一つとして,距離空間の Ahlfors regular conformal dimension の p-energy を用いた特徴付けを行った.非線形抵抗ネットワークに関するポテンシャル論の研究として,ロイデンコンパクト化および倉持コンパクト化とその上のポアソン方程式の可解性,ディリクレ境界値問題のペロンの方法による解法,解の境界挙動を解析した.Brakkeの平均曲率流について,特に一次元曲率流の正則性について研究した.3種のFitzHugh-Nagumo反応拡散系に付随する非線形変分問題の最小化解の安定性やエネルギー評価等を研究した.開Riemann面のRunge性とstrong disk性についての同値性について新たな知見を得た.リーマン球面から有限個の点を除いたリーマン面について,その双曲距離の一様評価についても研究を行った.有界一様領域において境界に特異点をもつLane-Emden方程式の正値解の存在と非存在について境界増大評価やHarnack原理などのポテンシャル論研究を踏まえて優解劣解の議論に基づく証明を与えた.局所ゼータ関数の特異性及び有理型拡張を,ニュートン多面体が一点である非実解析的関数に付随する場合について調べた.

Current Status of Research Progress
Current Status of Research Progress

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

Reason

研究代表者,分担者ともに活発な研究活動を行い,昨年度は査読付き論文10編(掲載予定を含む),招待講演15件(代表的なものを選定)を行った.ポテンシャル論を中核とし,複素解析,PDE,確率論,幾何学に渡る多様な研究成果が上がった.また,本研究課題で学術研究員として雇用していた原は日本学術振興会の特別研究員(学振PD)への申請が認められ,平成30年度から学振PDにステップアップすることになった.

Strategy for Future Research Activity

平成29年度に上がった研究成果をさらに発展させ,研究代表者と分担者は協力してポテンシャル解析を様々な局面に応用していく.とくに研究代表者はアイルランドにおける国際研究集会で本プロジェクトを広く周知するとともに,新しい研究の方向性を探る.また,研究代表者と分担者・志賀は台湾における国際会議AIMSの特別Sessionを組織する.さらに,University of Missouriで平成30年7月に学位取得予定のAdisak Seesaneaを学術研究員として雇用し,本研究課題の非線形PDEと幾何に関連する分野の研究を推進する.

  • Research Products

    (31 results)

All 2018 2017 Other

All Int'l Joint Research (5 results) Journal Article (10 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 10 results,  Open Access: 4 results) Presentation (15 results) (of which Int'l Joint Research: 11 results,  Invited: 15 results) Funded Workshop (1 results)

  • [Int'l Joint Research] University of Padova(Italy)

    • Country Name
      Italy
    • Counterpart Institution
      University of Padova
  • [Int'l Joint Research] University of Bristol(英国)

    • Country Name
      UNITED KINGDOM
    • Counterpart Institution
      University of Bristol
  • [Int'l Joint Research] University College Cork(Ireland)

    • Country Name
      Ireland
    • Counterpart Institution
      University College Cork
  • [Int'l Joint Research] University of Linkoping(Sweden)

    • Country Name
      Sweden
    • Counterpart Institution
      University of Linkoping
  • [Int'l Joint Research] University of Cincinnati(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      University of Cincinnati
  • [Journal Article] Dichotomy of global capacity density in metric measure spaces2018

    • Author(s)
      H. Aikawa, A. Bjorn, J. Bjorn, N. Shanmugalingam
    • Journal Title

      Advances in Calculus of Variations

      Volume: 11 Pages: 387-404

    • DOI

      10.1515/acv-2016-0066

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Removable sets for continuous solutions of quasilinear elliptic equations with nonlinear source or absorption terms2018

    • Author(s)
      Kentaro Hirata, Takayori Ono
    • Journal Title

      Ann. Mat. Pura Appl.

      Volume: 197 Pages: 41-59

    • DOI

      s10231-017-0667-y

    • Peer Reviewed
  • [Journal Article] On a Variational Problem Arising from the Three-component FitzHugh-Nagumo Type Reaction-Diffusion Systems2018

    • Author(s)
      Takashi Kajiwara and Kazuhiro Kurata
    • Journal Title

      Tokyo J. Math. advance publication

      Volume: 41 Pages: 掲載決定

    • DOI

      10.3836/tjm/1502179257

    • Peer Reviewed
  • [Journal Article] A fixed contact angle condition for varifolds2017

    • Author(s)
      T. Kagaya, Y. Tonegawa
    • Journal Title

      Hiroshima Math. J.

      Volume: 47 Pages: 139-153

    • Peer Reviewed / Open Access
  • [Journal Article] Convergence of Dirichlet forms induced on boundaries of transient networks2017

    • Author(s)
      Kasue, Atsushi
    • Journal Title

      Potential Anal

      Volume: 47 Pages: 189-233

    • DOI

      10.1007/s11118-017-9613-2

    • Peer Reviewed
  • [Journal Article] Asymptotic limit of oscillatory integrals with certain smooth phases2017

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

      RIMS Kokyuroku Bessatsu

      Volume: B63 Pages: 103-114

    • Peer Reviewed / Open Access
  • [Journal Article] A note on successive coefficients of convex functions2017

    • Author(s)
      Ming LI, Toshiyuki Sugawa
    • Journal Title

      Comput. Methods Func. Theory

      Volume: 17 Pages: 179-193

    • DOI

      10.1007/s40315-016-0177-8

    • Peer Reviewed
  • [Journal Article] Spirallikeness of shifted hypergeometric functions2017

    • Author(s)
      Toshiyuki Sugawa, Li-Mei Wang
    • Journal Title

      Ann. Acad. Sci. Fenn. Math.

      Volume: 42 Pages: 963-977

    • DOI

      10.5186/aasfm.2017.4257

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Geometric properties of the shifted hypergeometric functions2017

    • Author(s)
      Toshiyuki Sugawa, Li-Mei Wang
    • Journal Title

      Complex Analysis and Operator Theory

      Volume: 11 Pages: 1879-1893

    • DOI

      10.1007/s11785-017-0674-4

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Almost-isometry between the Teichm?ller metric and the length-spectrum metric on reduced moduli space for surfaces with boundary2017

    • Author(s)
      L. Liu, H. Shiga, W. Su and Y. Zhong
    • Journal Title

      Trans. Amer. Math. Soc.

      Volume: 369 Pages: 6429-6464

    • DOI

      10.1090/tran/6877

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Capacitary width and its applications to parabolic and elliptic boundary behavior2018

    • Author(s)
      H. Aikawa
    • Organizer
      Analysis Seminar (Unviersity of Padova, Italy)
    • Invited
  • [Presentation] Capacitary width and its applications to parabolic and elliptic boundary behavior2018

    • Author(s)
      H. Aikawa
    • Organizer
      Analysis and Geometry Seminars (Unviersity of Bristol, UK)
    • Invited
  • [Presentation] Capacitary width and its applications to parabolic and elliptic boundary behavior2018

    • Author(s)
      H. Aikawa
    • Organizer
      London Analysis and Probability Seminar (Imperial College, UK)
    • Invited
  • [Presentation] Global integrability of superharmonic functions and supertemperatures2018

    • Author(s)
      H. Aikawa
    • Organizer
      Analysis Seminar (Unviersity College Cork, Ireland)
    • Invited
  • [Presentation] Dichotomy of global capacity density2017

    • Author(s)
      H. Aikawa
    • Organizer
      Probability and Analysis 2017 (Banach Center, Poland)
    • Int'l Joint Research / Invited
  • [Presentation] Dichotomy of global capacity density2017

    • Author(s)
      H. Aikawa
    • Organizer
      Complex and Harmonic Analysis III (Holon Institute of Technology, Israel)
    • Int'l Joint Research / Invited
  • [Presentation] Existence and regularity for Brakke's mean curvature flow2017

    • Author(s)
      Y.Tonegawa
    • Organizer
      Calculus of variations and nonlinear partial differential equations (Berkeley, USA)
    • Int'l Joint Research / Invited
  • [Presentation] A conservation property of Brownian motion with killing of a Riemannian manifold2017

    • Author(s)
      J. Masamune
    • Organizer
      Analysis and PDEs on Manifolds (天津,中国)
    • Int'l Joint Research / Invited
  • [Presentation] Generalized conservation property2017

    • Author(s)
      J. Masamune
    • Organizer
      Japanese-German Open Conference on Stochastic Analysis 2017 (Kaiserslautern, Germany)
    • Int'l Joint Research / Invited
  • [Presentation] An application of the Loewner theory to trivial Beltrami oefficients2017

    • Author(s)
      T. Sugawa
    • Organizer
      Complex and Harmonic Analysis III (Holon Institute of Technology, Israel)
    • Int'l Joint Research / Invited
  • [Presentation] Convexity of domains and its characterization with respect to various metrics2017

    • Author(s)
      T. Sugawa
    • Organizer
      25th ICFIDCAA (Hong Kong)
    • Int'l Joint Research / Invited
  • [Presentation] Extension of holomorphic motions and monodromy2017

    • Author(s)
      H. Shiga
    • Organizer
      The Spring Eastern Sectional Meeting #1129 of the American Mathematical Society (New York, USA)
    • Int'l Joint Research / Invited
  • [Presentation] Holomorphic Motions and the Extension Problem2017

    • Author(s)
      H. Shiga
    • Organizer
      2017 NCTS Workshop on Dynamical Systems (Taipei, Taiwan)
    • Int'l Joint Research / Invited
  • [Presentation] Thick parts of the moduli space of Riemann surfaces and pseudo-Anosov maps2017

    • Author(s)
      H. Shiga
    • Organizer
      Iberoamerican Congress on Geometry 2018 (Valladolid, Spain)
    • Int'l Joint Research / Invited
  • [Presentation] Ahlfors regular conformal dimension and critical value of p-energies of a compact metric space2017

    • Author(s)
      J. Kigami
    • Organizer
      1134th AMS Sectional Meeting (California, USA)
    • Int'l Joint Research / Invited
  • [Funded Workshop] Potential Analysis and its Related Fields 20172017

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Published: 2018-12-17   Modified: 2022-03-29  

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