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arXiv 1408.0447math.AP
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高维空间中Wave Equations方程正解的爆破

Blow-Up of Positive Solutions to Wave Equations in High Space Dimensions

Hiroyuki Takamura, Mohammad Rammaha, Hiroshi Uesaka, Kyouhei Wakasa

摘要:

本文研究半线性波动方程$u_{tt}-Δu=F(u) \ \mbox{in} \ R^n\times[0, \infty)$的Cauchy问题,其中空间维数为$n \ge 2$,$F(u)=|u|^p$或$F(u)=|u|^{p-1}u$,带$p>1$ .在这里,柯西数据是非零和非紧支持的。我们关于正径向解(在低维$n=2, 3$中不一定是径向的)爆破的结果推广和扩展了Takamura(1995)和Takamura,Uesaka and Wakasa(2011)的结果.本文的主要技术难点在于在偶数维空间中,当初始位置和初始速度都不恒为零时,自由解的下界的确定。

英文摘要:

This paper is concerned with the Cauchy problem for the semilinear wave equation: $u_{tt}-Δu=F(u) \ \mbox{in} \ R^n\times[0, \infty)$, where the space dimension $n \ge 2$, $F(u)=|u|^p$ or $F(u)=|u|^{p-1}u$ with $p>1$. Here, the Cauchy data are non-zero and non-compactly supported. Our results on the blow-up of positive radial solutions (not necessarily radial in low dimensions $n=2, 3$) generalize and extend the results of Takamura(1995) and Takamura, Uesaka and Wakasa(2011). The main technical difficulty in the paper lies in obtaining the lower bounds for the free solution when both initial position and initial velocity are non-identically zero in even space dimensions.

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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