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arXiv 1208.6045math.AP
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关于Poincaré不等式中常数一致性的注记

A note on the uniformity of the constant in the Poincaré inequality

David Ruiz

摘要:

经典的Poincaré不等式证明了对任意有界正则整环$Ω\subset \R^N$,存在一个常数$C=C(Ω)>0$使得$$ \int_Ω |u|^2\, dx \leq C \int_Ω |\nabla u|^2\, dx \ \ \forall u \in H^1(Ω),\ \int_Ω u(x) \, dx=0.$$本文证明了当$Ω$在某类整环中时,$C$可独立于$Ω$取.我们的结果在这个方向上推广了以前的结果。

英文摘要:

The classical Poincaré inequality establishes that for any bounded regular domain $Ω\subset \R^N$ there exists a constant $C=C(Ω)>0$ such that $$ \int_Ω |u|^2\, dx \leq C \int_Ω |\nabla u|^2\, dx \ \ \forall u \in H^1(Ω),\ \int_Ω u(x) \, dx=0.$$ In this note we show that $C$ can be taken independently of $Ω$ when $Ω$ is in a certain class of domains. Our result generalizes previous results in this direction.

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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