Interaction between nonlinear diffusion and geometry of domain
Interaction between nonlinear diffusion and geometry of domain
复制标题
非线性扩散与域几何形状之间的相互作用
DOI:
10.1016/j.jde.2011.08.017
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发表时间:
2010
期刊:
影响因子:
--
通讯作者:
Shigeru Sakaguchi
中科院分区:
文献类型:
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作者:
R. Magnanini;Shigeru Sakaguchi
Let Ω be a domain in RN, where N⩾2 and ∂Ω is not necessarily bounded. We consider nonlinear diffusion equations of the form ∂tu=Δϕ(u). Let u=u(x,t) be the solution of either the initial-boundary value problem over Ω, where the initial value equals zero and the boundary value equals 1, or the Cauchy problem where the initial data is the characteristic function of the set RN∖Ω. We consider an open ball B in Ω whose closure intersects ∂Ω only at one point, and we derive asymptotic estimates for the content of substance in B for short times in terms of geometry of Ω. Also, we obtain a characterization of the hyperplane involving a stationary level surface of u by using the sliding method due to Berestycki, Caffarelli, and Nirenberg. These results tell us about interactions between nonlinear diffusion and geometry of domain.
DOI:
--
发表时间:
2007
期刊:
Proceedings of the Royal Society of Edinburgh, Section A 137・2
影响因子:
--
作者:
R.Magnanini;S.Sakaguchi
通讯作者:
S.Sakaguchi