LOCALIZATION OF SOLUTIONS TO A DOUBLY DEGENERATE PARABOLIC EQUATION WITH A STRONGLY NONLINEAR SOURCE

LOCALIZATION OF SOLUTIONS TO A DOUBLY DEGENERATE PARABOLIC EQUATION WITH A STRONGLY NONLINEAR SOURCE
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具有强非线性源的双简并抛物方程解的局部化

DOI:
10.1142/s0219199712500186
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发表时间:
2012-06
影响因子:
1.6
通讯作者:
Liu, Dengming
Liu, Dengming
中科院分区:
数学2区
文献类型:
--
作者:
Mu, Chunlai;Zheng, Pan;Liu, Dengming

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本文研究了一类具有强非线性源$$ u_t=\mathop{\rm div}(|\nabla u^m|^{p-2}\nabla u^l)+u^q, \quad (x,t)\in R^N\times(0,T), $$的双重退化抛物方程的Cauchy问题解的局域性,其中N≥1,p > 2和m, 1, q > 1。当q > l + m(p - 2)时,证明了当初始数据u0(x)有紧支撑时,解u(x, t)具有严格的局域性;当初始数据u0(x)满足径向对称衰减时,解u(x, t)具有有效局域性。并且,当1 < q < l + m(p - 2)时,我们得到柯西问题的解在RN的任意点爆破为具有紧支持的任意初始数据。
In this paper, we investigate the localization of solutions of the Cauchy problem to a doubly degenerate parabolic equation with a strongly nonlinear source $$ u_t=\mathop{\rm div}(|\nabla u^m|^{p-2}\nabla u^l)+u^q, \quad (x,t)\in R^N\times(0,T), $$ where N ≥ 1, p > 2 and m, l, q > 1. When q > l + m(p - 2), we prove that the solution u(x, t) has strict localization if the initial data u0(x) has a compact support, and we also show that the solution u(x, t) has the property of effective localization if the initial data u0(x) satisfies radially symmetric decay. Moreover, when 1 < q < l + m(p - 2), we obtain that the solution of the Cauchy problem blows up at any point of RN to arbitrary initial data with compact support.
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发表时间: 1987-07
期刊: Ussr Computational Mathematics and Mathematical Physics
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