Electron. J. Differential Equations, Vol. 2021 (2021), No. 67, pp. 1-17.

Asymptotic behavior of solutions to coupled semilinear parabolic systems with boundary degeneracy

Xinxin Jing, Yuanyuan Nie, Chunpeng Wang

Abstract:
This article concerns the asymptotic behavior of solutions to coupled semilinear parabolic systems with boundary degeneracy. For the problem in a bounded domain, it is proved that there exist both nontrivial global and blowing-up solutions if the degeneracy is not strong, while any nontrivial solution must blow up in a finite time if the degeneracy is enough strong. For the problem in an unbounded domain, blowing-up theorems of Fujita type are established. It is shown that the critical Fujita curve is determined by the strength of degeneracy. In particular, it is infinite if the degeneracy is enough strong.

Submitted March 19, 2021. Published August 10, 2021.
Math Subject Classifications: 35K65, 35D30, 35B33.
Key Words: Asymptotic behavior; boundary degeneracy.
DOI: https://doi.org/10.58997/ejde.2021.67

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Xinxin Jing
School of Mathematics
Jilin University
Changchun 130012, China
email: 1776043712@qq.com
Yuanyuan Nie
School of Mathematics
Jilin University
Changchun 130012, China
email: nieyy@jlu.edu.cn
Chunpeng Wang
School of Mathematics
Jilin University
Changchun 130012, China
email: wangcp@jlu.edu.cn

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