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arXiv 1201.4337math.APmath-phmath.MP
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能量次临界wave equations的稳定自相似爆破

Stable self-similar blow up for energy subcritical wave equations

Roland Donninger, Birgit Schörkhuber

摘要:

本文考虑半线性波动方程\[ \partial_t^2 ψ-Δψ=|ψ|^{p-1}ψ\],其中径向数据为$\R^{3}$,方程为$1<p\leq 3$。该方程允许由$$ ψ^T(t,x)=κ_p (T-t)^{-\frac{2}{p-1}} $$给出的显式空间齐次爆破解$ψ^T$,其中$T>0$和$κ_p$是$p$依赖的常数。我们证明了由$ψ^T$描述的爆破对能量拓扑中的小扰动是稳定的。这补充了Merle和Zaag以前的结果。该方法具有较强的鲁棒性,并可应用于其它自相似爆破问题,即使在能量超临界的情况下。

英文摘要:

We consider the semilinear wave equation \[ \partial_t^2 ψ-Δψ=|ψ|^{p-1}ψ\] for $1<p\leq 3$ with radial data in $\R^{3}$. This equation admits an explicit spatially homogeneous blow up solution $ψ^T$ given by $$ ψ^T(t,x)=κ_p (T-t)^{-\frac{2}{p-1}} $$ where $T>0$ and $κ_p$ is a $p$-dependent constant. We prove that the blow up described by $ψ^T$ is stable against small perturbations in the energy topology. This complements previous results by Merle and Zaag. The method of proof is quite robust and can be applied to other self-similar blow up problems as well, even in the energy supercritical case.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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