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2020 Fiscal Year Final Research Report

Singularity of solutions and stationary problems for nonlinear parabolic equations

Research Project

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Project/Area Number 17K05333
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Mathematical analysis
Research InstitutionHiroshima University (2020)
Ehime University (2017-2019)

Principal Investigator

Naito Yuki  広島大学, 先進理工系科学研究科(理), 教授 (10231458)

Co-Investigator(Kenkyū-buntansha) 猪奥 倫左  東北大学, 理学研究科, 准教授 (50624607)
Project Period (FY) 2017-04-01 – 2021-03-31
Keywords非線形解析 / 非線形楕円型方程式 / 非線形熱方程式 / 自己相似解 / 特異解
Outline of Final Research Achievements

We showed the existencde and the uniquness of the singular solutions to semilinear elliptic partial differential equations with Sobolev super-critical nonlinearity. We also showed the convergence of regular solutions to the singular solution.
We consider positive solutions of the semilinear heat equation with supercritical power nonlinearity, and construct peaking solutions by connecting a backward selfsimilar solution with a forward self-similar solution. In particular, we show the existence of incomplete blow-up solutions with blow-up profile above the singular steady state.

Free Research Field

数物系科学

Academic Significance and Societal Importance of the Research Achievements

非線形楕円型偏微分方程式に対する境界値問題に対して、特異解から分岐構造を解析するという新たな手法の確立が期待できる。
特異定常解より大きな爆発形状をもつ不完全爆発解の構成により「爆発形状が特異定常解より大きければ完全爆発である」という直感を裏切る結果が得られた。これにより、非線形熱方程式における爆発問題において新たな進展が期待できる。

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Published: 2022-01-27  

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