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arXiv 1507.08883math.APmath.DGmath.FA
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负曲率黎曼流形上的多孔介质方程

The porous medium equation with measure data on negatively curved Riemannian manifolds

Gabriele Grillo, Matteo Muratori, Fabio Punzo

摘要:

研究负弯曲黎曼流形上多孔介质方程柯西问题弱解的存在性和唯一性。我们证明了解的存在性,作为初始条件的有限氡措施,不一定是积极的。然后,我们建立在类的非负解的唯一性。另一方面,我们证明了多孔介质方程的任何弱解都必须以有限Radon测度为初始基准。此外,我们还得到了流形上势分析中的一些结果,涉及到上调和函数的中值不等式的修正形式的有效性,以及正Radon测度的势的性质.这样的结果是新的和独立的利益,是至关重要的,我们的方法。

英文摘要:

We investigate existence and uniqueness of weak solutions of the Cauchy problem for the porous medium equation on negatively curved Riemannian manifolds. We show existence of solutions taking as initial condition a finite Radon measure, not necessarily positive. We then establish uniqueness in the class of nonnegative solutions. On the other hand, we prove that any weak solution of the porous medium equation necessarily takes on as initial datum a finite Radon measure. In addition, we obtain some results in potential analysis on manifolds, concerning the validity of a modified version of the mean-value inequality for superharmonic functions, and properties of potentials of positive Radon measures. Such results are new and of independent interest, and are crucial for our approach.

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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