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arXiv 0905.1464math.OCmath.FA
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凸区域上一类泛函的极大化及最远凸集的刻画

On the maximization of a class of functionals on convex regions, and the characterization of the farthest convex set

Evans Harrell, Antoine Henrot

摘要:

我们考虑一类泛函$J$在平面凸集$K$上被极大化,对于这些凸集,周长和Steiner点是固定的。假设$J$是一个二次表达式在支撑函数$h$的积分,我们证明了最大化总是一个三角形或一个线段(可以被认为是一个折叠的三角形)。在主要定理的具体后果是这样一个事实,即任何凸体$K_1$的有限周长,集类中,我们认为是最远的意义上的$L^2$距离始终是一个线段。我们还证明了Hausdorff距离的相同性质。

英文摘要:

We consider a family of functionals $J$ to be maximized over the planar convex sets $K$ for which the perimeter and Steiner point have been fixed. Assuming that $J$ is the integral of a quadratic expression in the support function $h$, we show that the maximizer is always either a triangle or a line segment (which can be considered as a collapsed triangle). Among the concrete consequences of the main theorem is the fact that, given any convex body $K_1$ of finite perimeter, the set in the class we consider that is farthest away in the sense of the $L^2$ distance is always a line segment. We also prove the same property for the Hausdorff distance.

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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