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自由境界問題における特異極限および特異錐

Research Project

Project/Area Number 15740100
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Global analysis
Research InstitutionThe University of Tokyo

Principal Investigator

G・S Weiss (WEISS G・S)  東京大学, 大学院・数理科学研究科, 助教授 (30282817)

Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2005: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2004: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2003: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywords非線形偏微分方程式 / 自由境界問題 / 正則性 / 特異極限問題 / 特異点 / 特異極限 / 個体燃焼理論 / Aleksandrov反射 / インタフェース / 単調性等式 / fingering / 境界正則性 / log-concave 初期値 / いぶり
Research Abstract

平成17年度には,下記の結果が得られた。
1.個体燃焼理論の数学
Regis Monneau氏(CERMICS、パリ)と、活性化エネルギーが∞へ行くときのSelf-propagating High temperature Synthesis(SHS,自己燃焼合成法)の精密な極限を求めた.我々の結果はB.J.Matkowksy-G.I.Sivashinskyの1978年のscaling, A.Bayliss-B.J.Matkowksy-A.P.Aldushinの2002年のscalingなどへの適用が可能である.精密な極限問題は変数係数の過冷水のステファン問題である.
高次元では解析の未解決問題が数多く残っているが,我々が導き出した精密な極限問題によって,数値解析で観察されたpulsating waveを驚くほど簡単に説明することができる.
2.不安定自由境界問題
個体燃焼理論で1次近似として現れる不安定偏微分方程式
Δu=-X{u>0}
をRegis Monneau氏(CERMICS,パリ)と研究し,2次非退化解に関する部分正則性とminimizerの正則性を示した.
さらに,J.Andersson氏(Max Planck研究所,Leipzig,ドイツ)との共同研究によって,特異点の例,つまり2階導関数が非有界な例と退化解の例を構築した.

Report

(3 results)
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (16 results)

All 2006 2005 2004 2003 Other

All Journal Article (10 results) Publications (6 results)

  • [Journal Article] SHS in the high activation energy regime2006

    • Author(s)
      R.Monneau, G.S.Weiss
    • Journal Title

      Acta Mathematica Universibtis Comenianae (to appear)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Cross-shaped and degenerate singularities2005

    • Author(s)
      J.Andersson, G.S.Weiss
    • Journal Title

      J.Diff.Equations doi:10.1016/j.jde.2005.11.008

      Pages: 1-8

    • Related Report
      2005 Annual Research Report
  • [Journal Article] The two-phase membrane problem2005

    • Author(s)
      H.Shahgholian, G.S.Weiss
    • Journal Title

      Adv.Math doi:10.1016/j.a.m.2005.07.015

      Pages: 1-17

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Regularity in free boundary problems2005

    • Author(s)
      G.S.Weiss
    • Journal Title

      AMS Translations 215

      Pages: 1-14

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Global Solutions of an Obstacle-Problem-like Equation2004

    • Author(s)
      H.Shahgholian, N.Uraltsava, G.S.Weiss
    • Journal Title

      Monatshefte fur Mathematik 142

      Pages: 27-34

    • Related Report
      2004 Annual Research Report
  • [Journal Article] A Parabolic Free Boundary Value Problem with Double Pinning2004

    • Author(s)
      G.S.Weiss
    • Journal Title

      Nonlinear Analysis 57

      Pages: 153-172

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Boundary Monotonicity Formulae and applications to free boundary problems I: The elliptic case2004

    • Author(s)
      G.S.Weiss
    • Journal Title

      Electronic Journal of Diff.Equations 44

      Pages: 1-12

    • Related Report
      2004 Annual Research Report
  • [Journal Article] A Singular Limit arising in Combustion Theory2003

    • Author(s)
      G.S.Weiss
    • Journal Title

      Calc.Var.Partial Differential Equations 17

      Pages: 311-340

    • Related Report
      2004 Annual Research Report
  • [Journal Article] A Semilinear Parabolic Equation with Free Boundary2003

    • Author(s)
      H.J.Choe, G.S.Weiss
    • Journal Title

      Indiana Univ.Math.J. 52

      Pages: 19-50

    • Related Report
      2004 Annual Research Report
  • [Journal Article] The Two-Phase Membrane Problem - an intersection-comparison approach to the regularity at branch points.

    • Author(s)
      H.Shahgholian, G.S.Weiss
    • Journal Title

      Advances in Mathematics (発表予定)

    • Related Report
      2004 Annual Research Report
  • [Publications] G.S.Weiss: "An obstacle-Problem-lik Equation…"Interfaces and Free Boundaries. 3. 1-8 (2001)

    • Related Report
      2003 Annual Research Report
  • [Publications] G.S.Weiss: "A Singular Limit arising in Combination Theory"Calc.Var.PDE. 17. 311-340 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.J.Choe, G.S.Weiss: "A Similinar Parabolic Equation with Free Boundary"Indian Univ.Math.J.. 52. 19-50 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] G.S.Weiss: "A Parabolic Free Boundary Problem with Double Pinning"Nonlinear Analysis. (to appear).

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Shahgholian, N.Uraltswa, G.S.Weiss: "Global Solutions of an Obstacle-Problem-like Eq."Monatshefte fur Mathematik. (to appear).

    • Related Report
      2003 Annual Research Report
  • [Publications] G.S.Weiss: "Boundary Monotonicity Formulae and Applications"Electronic Journal of Differential Eq.. (to appear).

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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