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arXiv 2211.03357math.AP
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各向异性慢扩散方程的Liouville刚性和时间非本征Harnack估计

Liouville rigidity and time-extrinsic Harnack estimates for an anisotropic slow diffusion

Simone Ciani, Umberto Guarnotta

摘要:

我们证明了一个完全各向异性的原型发展方程的古非负解是常数的,如果他们满足一个条件,有限的传播速度,如果他们都是单侧有界的,在空间上有界的一个单一的时间水平。当在单个空间点给出界限时,类似的陈述是有效的。作为一个一般的范例,Hölder估计提供了刚性的基础。最后,我们证明了最近的内在Harnack估计可以改进为对非内在时间有效的Harnack不等式。在当地,它们是等价的。

英文摘要:

We prove that ancient non-negative solutions to a fully anisotropic prototype evolution equation are constant if they satisfy a condition of finite speed of propagation and if they are both one-sided bounded, and bounded in space at a single time level. A similar statement is valid when the bound is given at a single space point. As a general paradigm, Hölder estimates provide the basics for rigidity. Finally, we show that recent intrinsic Harnack estimates can be improved to a Harnack inequality valid for non-intrinsic times. Locally, they are equivalent.

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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