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arXiv 2005.10570math.APmath.PR
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二维随机非线性wave equations的全局动力学

Global dynamics for the two-dimensional stochastic nonlinear wave equations

Massimiliano Gubinelli, Herbert Koch, Tadahiro Oh, Leonardo Tolomeo

摘要:

研究了二维环面上带时空白噪声强迫的随机非线性波动方程的全局时动力学。我们在本文中的目标是双重的。(i)通过引入一个混合参数,结合$I$ -方法在随机设置与Gronwall型参数,我们首先证明了整体适定性的(重整化)立方SNLW在散焦的情况下。我们的论证给出了解的Sobolev范数的双指数增长性界。(ii)然后我们研究了散焦情形下的随机阻尼非线性波动方程。特别是,通过应用Bourgain的不变测度参数,我们证明了几乎必然的全球适定性的(重整化)散焦SdNLW的吉布斯测度和吉布斯测度的不变性。

英文摘要:

We study global-in-time dynamics of the stochastic nonlinear wave equations (SNLW) with an additive space-time white noise forcing, posed on the two-dimensional torus. Our goal in this paper is two-fold. (i) By introducing a hybrid argument, combining the $I$-method in the stochastic setting with a Gronwall-type argument, we first prove global well-posedness of the (renormalized) cubic SNLW in the defocusing case. Our argument yields a double exponential growth bound on the Sobolev norm of a solution. (ii) We then study the stochastic damped nonlinear wave equations (SdNLW) in the defocusing case. In particular, by applying Bourgain's invariant measure argument, we prove almost sure global well-posedness of the (renormalized) defocusing SdNLW with respect to the Gibbs measure and invariance of the Gibbs measure.

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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