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arXiv 1802.04726math.CV
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关于下调和函数的一个比较定理

A comparison theorem for subharmonic functions

Thai-Duong Do

摘要:

本文证明了下调和函数的中值定理和比较定理的一个推广。这些定理被用来回答这样一个问题:我们是否可以得出这样的结论:关于曲面测度,在曲面上几乎处处一致的两个下调和函数在该曲面上必定处处一致。我们证明了这个问题在超曲面的情况下有一个肯定的答案,我们也提供了一个反例的情况下,表面的更高的余维。我们也将这些结果应用于Ahlfors-David集,并证明了其他版本的主要结果的措施密度。

英文摘要:

In this article, we prove an extension of the mean value theorem and a comparison theorem for subharmonic functions. These theorems are used to answer the question whether we can conclude that two subharmonic functions which agree almost everywhere on a surface with respect to the surface measure must coincide everywhere on that surface. We prove that this question has a positive answer in the case of hypersurfaces, and we also provide a counterexample in the case of surfaces of higher co-dimension. We also apply these results to Ahlfors-David sets and we prove other versions of the main results in terms of measure densities.

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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