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arXiv 1401.2104math.OC
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有界凸函数变分的一个泛界

A universal bound on the variations of bounded convex functions

Joon Kwon

摘要:

给定实向量空间$E$中的凸集$C$和两个点$x,y\in C$,我们研究了哪些是变差$f(y)-f(x)$的可能值,其中$f:C\longrightarrow [m,M]$是有界凸函数.然后,我们重写的Funk弱度量,这将意味着一个有界的凸函数是Lipschitz连续的汤普森和希尔伯特度量方面的边界。也证明了边界是最优的。我们还证明了有界凸函数在给定点$x\in C$的极大次微分。

英文摘要:

Given a convex set $C$ in a real vector space $E$ and two points $x,y\in C$, we investivate which are the possible values for the variation $f(y)-f(x)$, where $f:C\longrightarrow [m,M]$ is a bounded convex function. We then rewrite the bounds in terms of the Funk weak metric, which will imply that a bounded convex function is Lipschitz-continuous with respect to the Thompson and Hilbert metrics. The bounds are also proved to be optimal. We also exhibit the maximal subdifferential of a bounded convex function at a given point $x\in C$.

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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