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arXiv 2107.12419math.AP
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随机Keller-Segel型方程解的整体存在性与爆破

On global existence and blowup of solutions of stochastic Keller-Segel type equation

Oleksandr Misiats, Oleksandr Stanzhytskyi, Ihsan Topaloglu

摘要:

本文考虑了带随机噪声扰动的随机Keller-Segel型方程。我们证明了对于特殊类型的随机扰动(即散度型),在小初值下方程存在整体弱解。此外,如果噪声不是在一个散度型,我们证明了解决方案有一个有限的时间爆破(与非零概率)的任何非零的初始数据。本文还得到了解对小扰动的连续依赖性以及局部强解的存在性。

英文摘要:

In this paper we consider a stochastic Keller-Segel type equation, perturbed with random noise. We establish that for special types of random pertubations (i.e. in a divergence form), the equation has a global weak solution for small initial data. Furthermore, if the noise is not in a divergence form, we show that the solution has a finite time blowup (with nonzero probability) for any nonzero initial data. The results on the continuous dependence of solutions on the small random perturbations, alongside with the existence of local strong solutions, are also derived in this work.

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