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2018 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) 志賀 啓成  東京工業大学, 理学院, 教授 (10154189)
木上 淳  京都大学, 情報学研究科, 教授 (90202035)
倉田 和浩  首都大学東京, 理学研究科, 教授 (10186489)
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)
加須栄 篤  金沢大学, 数物科学系, 教授 (40152657)
正宗 淳  北海道大学, 理学研究院, 教授 (50706538)
利根川 吉廣  東京工業大学, 理学院, 教授 (80296748)
堀田 一敬  山口大学, 大学院創成科学研究科, 講師 (10725237)
Project Period (FY) 2017-04-01 – 2021-03-31
Keywordsポテンシャル / 容量 / 調和 / 熱方程式 / 正値解 / リーマン多様体 / 平均曲率流 / レブナ-方程式
Outline of Annual Research Achievements

複雑領域のDirichlet最小固有値とその複雑領域をベースに持つシリンダー上の熱方程式の正値優解の大域可積分性との関連を調べた.有界Lipschitz領域においてLane-Emden方程式を含む半線形楕円型方程式に対して,境界に孤立特異点をもつ正値解の存在・非存在および境界全部でゼロとなる正値解の境界挙動について考察した.n+1次元有界狭義凸領域において任意に与えられたn次元閉修正可能集合を初期データとして,ディリクレ条件の下,時間発展するBrakkeの平均曲率流の時間大域存在定理の証明のめどをつけた.空間非一様項をもつ空間1次元のSchnackenberg数理モデルの対称なワンピーク定常解の構成と安定性解析を行った.FitzHugh-Nagumo反応拡散系における特異摂動問題におけるエネルギー漸近展開公式を得た.
リッチ曲率が一様に下から抑えられた完備リーマン多様体に対して,増大する距離球面の直径が適当に抑えられた場合,$\Delta u =u$の正値解がすべて爆発するということを発見した.多様体上のシュレディンガー作用素に対する一般化された熱の保存則をラプラス作用素に対する保存則により特徴づけ,任意の完備リーマン多様体は一般化された熱の保存則が成立するポテンシャルを持つことを証明した.
等角写像の力学系の理論とそのタイヒミュラー理論への応用を模索し,一般化されたレブナー方程式を用いて,適切な条件のもとでは等角写像の擬等角拡張を構成できることを示した.Klein群などの力学系から定義されるカントール集合の擬等角同値性を研究した.平面内の双曲領域,特に穴あき平面の双曲計量を具体的に評価した.Dirichlet formの与えられた距離・測度空間列がmonotonicityであればその射影極限上にDirichlet form が構成できることを示した.

Current Status of Research Progress
Current Status of Research Progress

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

Reason

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14編(掲載予定を含む),招待講演18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.本研究課題の学術研究員として米国Missouri大学で学位を取得したAdisak Seasaneaを雇用し,非線形PDEと実解析の関連研究を開始することができた.2019年2月には小規模な国際研究集会Potential Analysis and its Related Fields 2019を北海道大学で開催し,研究分担者の他に海外研究協力者Pnki Kim,Miciel van den Berg,Yi Huangらも出席して研究成果発表を行った.

Strategy for Future Research Activity

2018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.2019年4月に研究代表者は北海道大学から中部大学に異動になるので,名古屋周辺のポテンシャル論関係者と連絡を密にして研究を推進する.とくに名城大学の鈴木教授を研究分担者に加え,ポテンシャル解析の近似理論への応用を深める.また,鈴木教授の下で学位を取得した伊藤健太郎博士をRAとして雇用(9月まで中部大学,10月以降名城大学)し,この方面の研究を広げていく.研究代表者は定期的に北海道大学を訪問し,研究分担者・正宗および学術研究員のAdisak Seasanea,および学振PDの原と研究打ち合わせを行う.海外研究協力者とも連絡を取り合い,研究の進捗状況に合わせて招聘・訪問を行う.

  • Research Products

    (35 results)

All 2019 2018 Other

All Int'l Joint Research (1 results) Journal Article (14 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 14 results,  Open Access: 2 results) Presentation (18 results) (of which Int'l Joint Research: 15 results,  Invited: 18 results) Book (1 results) Funded Workshop (1 results)

  • [Int'l Joint Research] University of Bristol(英国)

    • Country Name
      UNITED KINGDOM
    • Counterpart Institution
      University of Bristol
  • [Journal Article] Potential theoretic notions related to integrability of superharmonic functions and supertemperatures2019

    • Author(s)
      Hiroaki Aikawa
    • Journal Title

      Analysis and Mathematical Physics

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Existence and stability of one-peak symmetric stationary solutions for the Schnakenberg model with heterogeneity2019

    • Author(s)
      Yuta Ishii and Kazuhiro Kurata
    • Journal Title

      Discrete and Conti. Dynamical System, Series-A.

      Volume: 35 Pages: 2807-2875

    • DOI

      10.3934/dcds.2019118

    • Peer Reviewed
  • [Journal Article] Loewner chains with quasiconformal extensions: an approximation approach2019

    • Author(s)
      Ikkei Hotta
    • Journal Title

      J. Anal. Math.

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Loewner theory for quasiconformal extensions: old and new2019

    • Author(s)
      Ikkei Hotta
    • Journal Title

      Interdiscip. Inform. Sci.

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Solutions to sublinear elliptic equations with finite generalized energy2019

    • Author(s)
      A. Seesanea and I. E. Verbitsky
    • Journal Title

      Calc. Var. Partial Differential Equations

      Volume: 58 Pages: 印刷中

    • DOI

      10.1007/s00526-018-1448-1

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Solutions in Lebesgue spaces to nonlinear elliptic equations with sub-natural growth terms2019

    • Author(s)
      A. Seesanea and I. E. Verbitsky
    • Journal Title

      St. Petersburg Math. J.

      Volume: 31 Pages: 印刷中

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A construction of trivial Beltrami coefficients2019

    • Author(s)
      T. Sugawa
    • Journal Title

      Proc. Amer. Math. Soc.

      Volume: 147 Pages: 629-635

    • DOI

      10.1090/proc/13965

    • Peer Reviewed
  • [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] A singular perturbation limit of diffused interface energy with a fixed contact angle condition2018

    • Author(s)
      Takashi Kagaya and Yoshihiro Tonegawa
    • Journal Title

      Indiana University Math. J.

      Volume: 67 Pages: 1425-1437

    • DOI

      10.1512/iumj.2018.67.7423

    • Peer Reviewed
  • [Journal Article] Two-sided estimates for positive solutions of superlinear elliptic boundary value problems2018

    • Author(s)
      Kentaro Hirata
    • Journal Title

      Bull. Aust. Math. Soc.

      Volume: 98 Pages: 465-473

    • DOI

      10.1017/S000497271800093X

    • Peer Reviewed
  • [Journal Article] Existence and nonexistence of a positive solution of the Lane-Emden equation having a boundary singularity: the subcritical case2018

    • Author(s)
      Kentaro Hirata
    • Journal Title

      Monatsh. Math.

      Volume: 186 Pages: 635-652

    • DOI

      10.1007/s00605-017-1103-5

    • Peer Reviewed
  • [Journal Article] Teichmuller spaces and tame quasiconformal motions2018

    • Author(s)
      Jiang Yunping, Mitra Sudeb, Shiga Hiroshige, Wang Zhe
    • Journal Title

      Tohoku Mathematical Journal

      Volume: 70 Pages: 607-631

    • DOI

      10.2748/tmj/1546570827

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Construction of nearly hyperbolic distance on punctured spheres2018

    • Author(s)
      T. Sugawa and T. Zhang
    • Journal Title

      Bull. Math. Sci.

      Volume: 8 Pages: 307-323

    • DOI

      10.1007/s13373-017-0111-z

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Coefficient estimates of analytic endomorphisms of the unit disk fixing a point with applications to concave functions2018

    • Author(s)
      R. Ohno and T. Sugawa
    • Journal Title

      Kyoto J. Math.

      Volume: 58 Pages: 227-241

    • DOI

      10.1215/21562261-2017-0015

    • Peer Reviewed
  • [Presentation] Introduction to Brakke's mean curvature flow2019

    • Author(s)
      Yoshihiro Tonegawa
    • Organizer
      Winter School for Evolution of Interfaces (Hausdorff Center at Bonn, Germany)
    • Int'l Joint Research / Invited
  • [Presentation] Weakly exponential measures and time changes of the Brownian motion2019

    • Author(s)
      Jun Kigami
    • Organizer
      Analysis and Geometry of Random Shapes (UCLA, USA)
    • Int'l Joint Research / Invited
  • [Presentation] Global integrability of supertemperatures2018

    • Author(s)
      Hiroaki Aikawa
    • Organizer
      International Conference on Complex Analysis, Potential Theory and Applications (Dublin, Ireland)
    • Int'l Joint Research / Invited
  • [Presentation] Global integrability of supertemperatures on a John cylinder2018

    • Author(s)
      Hiroaki Aikawa
    • Organizer
      2nd Hong Kong/Kyoto Workshop on Fractal Geometry and Related Areas (Kyoto University, Japan)
    • Int'l Joint Research / Invited
  • [Presentation] Parabolic and Elliptic Boundary Behavior on a Non-Smooth Domain2018

    • Author(s)
      Hiroaki Aikawa
    • Organizer
      The 12th AIMS Conference on Dynamical Systems, Differential Equations and Applications (National Taiwan University, Taiwan)
    • Int'l Joint Research / Invited
  • [Presentation] Global integrability of supertemperatures and related notions in potential theory2018

    • Author(s)
      Hiroaki Aikawa
    • Organizer
      The second Interdisciplinary and Research Alumni Symposium iJaDe2018, (Osaka University, Japan)
    • Int'l Joint Research / Invited
  • [Presentation] Global integrability of supertemperatures and related notions in potential theory2018

    • Author(s)
      Hiroaki Aikawa
    • Organizer
      The 13th HU and SNU Symposium on Mathematics,Probability and Functional Analysis, (Hokkaido University, Japan)
    • Int'l Joint Research / Invited
  • [Presentation] Existence and regularity theories of Brakke flow2018

    • Author(s)
      Yoshihiro Tonegawa
    • Organizer
      International School on Extrinsic Curvature Flows (ICTP, Trieste, Italy)
    • Int'l Joint Research / Invited
  • [Presentation] Precise asymptotic formula for the ground state energy of a quantum waveguide problem with Robin boundary condition2018

    • Author(s)
      倉田 和浩
    • Organizer
      信州大学偏微分方程式研究集会
    • Invited
  • [Presentation] Existence and stability of one-peak symmetric stationary solutions for the Schnakenberg model with heterogeneity2018

    • Author(s)
      倉田 和浩
    • Organizer
      偏微分方程式の解の幾何
    • Invited
  • [Presentation] Construction and stability analysis of one-peak symmetric stationary solutions to the Schnakenberg model with heterogeneity2018

    • Author(s)
      Kazuhiro Kurata
    • Organizer
      The 12th AIMS Conference on Dynamical Systems, Differential Equations and Applications (National Taiwan University, Taiwan)
    • Int'l Joint Research / Invited
  • [Presentation] Boundary Harnack principle for superharmonic functions satisfying a nonlinear inequality in a Lipschitz domain2018

    • Author(s)
      平田賢太郎
    • Organizer
      第61回函数論シンポジウム
    • Invited
  • [Presentation] Positive solutions to nonlinear elliptic equations with sub-natural growth terms2018

    • Author(s)
      A. Seesanea
    • Organizer
      The 13th HU-SNU Joint Symposium on Mathematics: Probability and Functional Analysis (Hokkaido University, Japan)
    • Int'l Joint Research / Invited
  • [Presentation] Aharonov invariants revisited2018

    • Author(s)
      T. Sugawa
    • Organizer
      Perspectives in Modern Analysis, Holon Institute of Technology, Israel
    • Int'l Joint Research / Invited
  • [Presentation] Refinments of Schwarz Lemma and their applications to concave functions2018

    • Author(s)
      T. Sugawa
    • Organizer
      Complex Analysis and its Applications, Gelendzhik, Russia
    • Int'l Joint Research / Invited
  • [Presentation] The Schur parameters and their applications2018

    • Author(s)
      T. Sugawa
    • Organizer
      XIX Conference on Analytic Functions and Related Topics, Rzeszow, Poland
    • Int'l Joint Research / Invited
  • [Presentation] Coefficient problems on bounded functions on the unit disk2018

    • Author(s)
      T. Sugawa
    • Organizer
      26th ICFIDCAA, Fuzhou, China
    • Int'l Joint Research / Invited
  • [Presentation] Nonlinear resolvent and inverse Loewner equations2018

    • Author(s)
      T. Sugawa
    • Organizer
      International Symposium on Geometric Function Theory 2018, Hunan Normal University, Changsha, China
    • Int'l Joint Research / Invited
  • [Book] Brakke's Mean Curvature Flow: An Introduction2019

    • Author(s)
      Yoshihiro Tonegawa
    • Total Pages
      100
    • Publisher
      Springer
    • ISBN
      978-981-13-7074-8
  • [Funded Workshop] Potential Analysis and its Related Fields 20192019

URL: 

Published: 2019-12-27  

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