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arXiv 2009.06137math.PRmath.DS
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一类多项式增长的非自治SPDE慢-快系统的强平均原理

Strong averaging principles for a class of non-autonomous slow-fast systems of SPDEs with polynomial growth

Ruifang Wang, Yong Xu

摘要:

本文研究了一类由Poisson随机测度驱动的非自治双时间尺度随机反应扩散方程,其中系数满足多项式增长条件和局部利普希茨条件.首先,通过构造辅助方程和利用停时技巧证明了该问题温和解的存在唯一性。然后,考虑系数的不定常,通过研究与冻结快方程相关的含时演化测度族的存在性,重新定义了平均方程。利用经典的Khasminskii方法证明了慢分量强收敛于相应的平均方程的解。

英文摘要:

In this work, we study a class of non-autonomous two-time-scale stochastic reaction-diffusion equations driven by Poisson random measures, in which the coefficients satisfy the polynomial growth condition and local Lipschitz condition. First, the existence and uniqueness of the mild solution are proved by constructing auxiliary equations and using the technique of stopping time. Then, consider that the time dependent of the coefficients, the averaged equation is redefined by studying the existence of time-dependent evolution family of measures associated with the frozen fast equation. Further, the slow component strongly converges to the solution of the corresponding averaged equation is verified by using the classical Khasminskii method.

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