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arXiv 2209.02531math.PR
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随机幂律方程的时间整体概率强解:存在性和非唯一性

Global-in-time probabilistically strong solutions to stochastic power-law equations: existence and non-uniqueness

Huaxiang Lü, Xiangchan Zhu

摘要:

我们考虑的是在$d\geq3$维中由加性随机强迫驱动的幂律流体。对于幂指数$r\in(1,\frac{3d+2}{d+2})$,我们证明了在$L^2\cap W^{1,\max\{1,r-1\}}$中的任意发散自由初始条件下,在$L^p_{loc}([0,\infty);L^2)\cap C([0,\infty);W^{1,\max\{1,r-1\}}),p\geq1$中存在无穷多个全局时间概率强解和解析弱解.这一结果特别意味着法律上的非唯一性。我们的结果是尖锐的三维情况下,在这个意义上的解决方案是唯一的,如果$r\geq \frac{3d+2}{d+2}$。

英文摘要:

We are concerned with the power-law fluids driven by an additive stochastic forcing in dimension $d\geq3$. For the power index $r\in(1,\frac{3d+2}{d+2})$, we establish existence of infinitely many global-in-time probabilistically strong and analytically weak solutions in $L^p_{loc}([0,\infty);L^2)\cap C([0,\infty);W^{1,\max\{1,r-1\}}),p\geq1$ for every divergence free initial condition in $L^2\cap W^{1,\max\{1,r-1\}}$. This result in particular implies non-uniqueness in law. Our result is sharp in the three dimensional case in the sense that the solution is unique if $r\geq \frac{3d+2}{d+2}$.

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