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arXiv 2007.02346math.AP
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关于障碍问题的对数上界不等式

On the logarithmic epiperimetric inequality for the obstacle problem

Luca Spolaor, Bozhidar Velichkov

摘要:

给出了障碍问题在奇点处的对数上围不等式的三种不同证明。在第一个直接证明中,我们明确地写出了竞争者;第二个证明也是建设性的,但这一次竞争者是通过解决球面上的演化问题给出的。我们比较竞争对手在不同的证明和他们的关系,最近出现的其他类似的结果。最后,在附录中,我们给出了一个一般定理,它也可以应用于其他情况下,其中竞争对手的建设减少到寻找满足两个微分不等式的流。

英文摘要:

We give three different proofs of the log-epiperimetric inequality at singular points for the obstacle problem. In the first, direct proof, we write the competitor explicitly; the second proof is also constructive, but this time the competitor is given through the solution of an evolution problem on the sphere. We compare the competitors obtained in the different proofs and their relation to other similar results that appeared recently. Finally, in the appendix, we give a general theorem, which can be applied also in other contexts and in which the construction of the competitor is reduced to finding a flow satisfying two differential inequalities.

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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