A complete estimate on the localization for a porous medium type equation
A complete estimate on the localization for a porous medium type equation
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DOI:
10.1007/s00033-013-0354-9
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发表时间:
2014-08
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影响因子:
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通讯作者:
Zhilei Liang;Shujuan Wang
中科院分区:
文献类型:
--
作者:
Zhilei Liang;Shujuan Wang
This paper is concerned with the porous medium equation u t = div ( u σ ∇ u ) + u β , ( x , t ) ∈ R N × ( 0 , T ) , whereσ> 0,β>σ+ 1, and the blowing-up timeT< ∞. It is shown in [5,7] that the solutionu(x,t) is localized in the case when the initial function has a compact support. In addition, an estimate on the size of the localization in terms of the initial support and the blowing-up timeTis partially derived in [5] ifβ>σ+ 3. In this paper we give a complete estimate on the localization for allβ>σ+ 1.