On directional blow-up for quasilinear parabolic equations with fast diffusion
On directional blow-up for quasilinear parabolic equations with fast diffusion
复制标题
快速扩散拟线性抛物方程的定向爆炸
DOI:
10.1016/j.jmaa.2007.05.033
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发表时间:
2008
影响因子:
1.3
通讯作者:
Yukihiro Seki
中科院分区:
文献类型:
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作者:
Yukihiro Seki
We discuss blow-up at space infinity of solutions to quasilinear parabolic equations of the form ut=Δϕ(u)+f(u) with initial data u0∈L∞(RN), where ϕ and f are nonnegative functions satisfying ϕ″⩽0 and ∫1∞dξ/f(ξ)<∞. We study nonnegative blow-up solutions whose blow-up times coincide with those of solutions to the O.D.E. v′=f(v) with initial data [Formula: see text] . We prove that such a solution blows up only at space infinity and possesses blow-up directions and that they are completely characterized by behavior of initial data. Moreover, necessary and sufficient conditions on initial data for blow-up at minimal blow-up time are also investigated.
DOI:
10.1016/j.jmaa.2005.05.007
发表时间:
2006-04
期刊:
--
影响因子:
--
作者:
Y. Giga;Noriaki Umeda
通讯作者:
Y. Giga;Noriaki Umeda