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arXiv 1802.08403math.AP
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具有非有效阻尼的半线性wave equations方程解的爆破

Blow up of solutions for semilinear wave equations with noneffective damping

Zijin Li, Xinghong Pan

摘要:

本文在$\mathbb{R}_{+}\times\mathbb{R}^n$中研究了具有含时阻尼的半线性波动方程\[ \partial_t^2u-Δu+\fracμ{1+t}\partial_tu=|u|^p \]解的有限时间爆破.更准确地说,对于$0\leqμ\leq 2,μ\neq1$和$n\geq 2$,不存在$1<p<p_S(n+μ)$的全局解,其中$p_S(k)$是$k$维施特劳斯指数,并且将获得爆破解的寿命。我们的工作是\cite{IS}的推广,作者在更大的$μ$范围内证明了类似的爆破结果。然而,我们得到一个更好的寿命估计时,$μ\in(0,1)\cup(1,2)$通过使用不同的方法。

英文摘要:

In this paper, we study the finite-time blow up of solutions to the following semilinear wave equation with time-dependent damping \[ \partial_t^2u-Δu+\fracμ{1+t}\partial_tu=|u|^p \] in $\mathbb{R}_{+}\times\mathbb{R}^n$. More precisely, for $0\leqμ\leq 2,μ\neq1$ and $n\geq 2$, there is no global solution for $1<p<p_S(n+μ)$, where $p_S(k)$ is the $k$-dimensional Strauss exponent and a life-span of the blow up solution will be obtained. Our work is an extension of \cite{IS}, where the authors proved a similar blow up result with a larger range of $μ$. However, we obtain a better life-span estimate when $μ\in(0,1)\cup(1,2)$ by using a different method.

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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