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arXiv 2007.00122math.AP
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各向异性快速扩散方程

Anisotropic Fast Diffusion Equations

Filomena Feo, Juan Luis Vázquez, Bruno Volzone

AI总结:

本文研究各向异性多孔介质方程在快速扩散范围内的自相似基本解,证明其由质量唯一确定,并刻画有限质量解的渐近行为、衰减率及正则性。

摘要:

我们证明了各向异性多孔介质方程在适当的快速扩散范围内存在自相似基本解(SSF)。每一个这样的SSF解都由其质量唯一确定。我们还依据自相似基本解族获得了所有有限质量解的渐近行为。文中推导了时间衰减率以及解的其他性质,如定量有界性、正性和正则性。自相似性与各向异性的结合在我们的分析中至关重要,并造成了严重的数学困难,这些困难通过新颖方法得到解决。

英文摘要:

We prove the existence of self-similar fundamental solutions (SSF) of the anisotropic porous medium equation in the suitable fast diffusion range. Each of such SSF solutions is uniquely determined by its mass. We also obtain the asymptotic behaviour of all finite-mass solutions in terms of the family of self-similar fundamental solutions. Time decay rates are derived as well as other properties of the solutions, like quantitative boundedness, positivity and regularity. The combination of self-similarity and anisotropy is essential in our analysis and creates serious mathematical difficulties that are addressed by means of novel methods.

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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