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arXiv 1208.4496math.PR
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一类随机heat equations方程整体解的不存在性

On non-existence of global solutions to a class of stochastic heat equations

Mohammud Foondun, Rana Parshad

摘要:

我们考虑$\partial_t u=-(-Δ)^{α/2} u + b(u) +σ(u)\dot w$形式的非线性抛物型随机偏微分方程,其中$\dot w$表示时空白噪声。函数$b$和$σ$都是局部Lipschitz连续的。在适当的参数条件下,我们证明了它们解的二阶矩在有限时间内爆破。这补充了Khoshnevisan及其合着者的近期作品;例如,参见Foondun和Khoshnevisan(2009),Foondun和Khoshnevisan(出现,2012)和Conus,Joseph和Khoshnevisan,以及Chow(Chow,2009和Chow,2011)。此外,在比较我们的随机方程与它们的确定性对应,我们发现,我们的结果表明,噪声的存在可能会影响爆破的发生。

英文摘要:

We consider nonlinear parabolic SPDEs of the form $\partial_t u=-(-Δ)^{α/2} u + b(u) +σ(u)\dot w$, where$\dot w$ denotes space-time white noise. The functions $b$ and $σ$ are both locally Lipschitz continuous. Under some suitable conditions on the parameters of these SPDEs, we show that the second moment of their solutions blow up in finite time. This complements recent works of Khoshnevisan and his coauthors; see for instance Foondun and Khoshnevisan (2009), Foondun and Khoshnevisan (to appear, 2012) and Conus, Joseph, and Khoshnevisan, as well as those of Chow (Chow, 2009, and Chow, 2011). Furthermore, upon comparing our stochastic equations with their deterministic counterparts, we find that our results indicates that the presence of noise might affect the occurrence of blow-up.

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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