Fisher-KPP equation with Robin boundary conditions on the real half line

被引：0
|
作者：
Suo, Jinzhe [1 ]
Tan, Kaiyuan [1 ,2 ]
机构：
[1] Shanghai Normal Univ, Math & Sci Coll, Shanghai 200234, Peoples R China
[2] Harbin Inst Technol, Dept Math, Harbin 150001, Peoples R China
来源：
NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS | 2022年 / 222卷
基金：
中国国家自然科学基金;
关键词：
Fisher-KPP equation; Robin boundary condition; Entire solution; Traveling wave solution; Asymptotic behavior; TRAVELING-WAVE SOLUTIONS; REACTION-DIFFUSION EQUATIONS; DIFFERENTIAL-EQUATIONS;
D O I：
10.1016/j.na.2022.112933
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
We consider the Fisher-KPP equation with Robin boundary conditions on the half line. We show that this problem has even number of nonnegative stationary solutions, which are ordered, a stable one is sandwiched by two unstable ones. Then we construct several types of entire solutions between them, each entire solution connects an unstable stationary solution with a stable one. In particular, we construct two types of entire solutions U-c(x, t) and U(x, t) connecting 0 and the smallest positive stationary solution. In addition, U-c tend to the traveling wave solution with speed c as t -> -infinity in a moving frame, and U(x, t) enjoys convexity. This paper extends the recent results of Lou, Lu and Morita in Lou et al. (2020) from Dirichlet boundary condition to Robin boundary condition. (c) 2022 Elsevier Ltd. All rights reserved.
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页数：14
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