Unfocused blow up solutions of semilinear parabolic equations

Unfocused blow up solutions of semilinear parabolic equations
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半线性抛物型方程的非聚焦放大解

DOI:
10.3934/dcds.1999.5.905
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发表时间:
1999
影响因子:
1.1
通讯作者:
J. Matos
J. Matos
中科院分区:
数学3区
文献类型:
--
作者:
J. Matos

文献摘要

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本文的目的是研究爆炸行为 径向对称解$u$的半线性 抛物方程 $u_t - \Delta u = |u|^{p-1} u, \quad x\in\Omega,\quad t\in [0,T]$, $u(t,x)=0, x\in\partial\Omega, \quad t\in [0,T] $, $u(0,x) =u_0(x),\quad x\in\Omega $, 在爆炸点周围,而不是对称中心周围。 我们假设$\Omega$是$\mathbb R^N$或中的一个球 $\Omega =\mathbb R^N$和$p>1$。 我们证明$u$表现为一维问题 所关注的,即可能的渐近行为 还有爆炸点周围的最终时间曲线 这些是与维数的情况相对应的吗 $N=1$。
The aim of this paper is to study the blow up behavior of a radially symmetric solution $u$ of the semilinear parabolic equation $u_t - \Delta u = |u|^{p-1} u, \quad x\in\Omega,\quad t\in [0,T]$, $u(t,x)=0, x\in\partial\Omega, \quad t\in [0,T] $, $u(0,x) =u_0(x),\quad x\in\Omega $, around a blow up point other than its centre of symmetry. We assume that $\Omega$ is a ball in $\mathbb R^N$ or $\Omega =\mathbb R^N$, and $p>1$. We show that $u$ behave as of a one-dimensional problem was concerned, that is, the possible asymptotic behaviors and final time profiles around an unfocused blow up point are the ones corresponding to the case of dimesion $N=1$.