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arXiv 2409.09448math.AP
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圆柱体中的形状优化问题及相关超定问题

A shape optimization problem in cylinders and related overdetermined problems

Paolo Caldiroli, Alessandro Iacopetti, Filomena Pacella

AI总结:

本文研究无限圆柱内区域在体积约束下的扭转能量形状优化,证明极小化元存在并揭示其几何拓扑性质,进而发现平凡圆柱区域并非唯一解或最优解。

摘要:

本文研究在体积约束下,与无限圆柱内包含的区域相关的扭转能量的形状优化问题。我们证明了对于所有固定体积,极小化元均存在,并展示了其一些几何和拓扑性质。由于该问题与刻画圆柱中允许超定问题有解的区域密切相关,我们的极小化结果使我们能够在该方向上推导出有趣的推论。特别是,我们发现,对于某些圆柱和某些体积,由有界圆柱给出的“平凡”区域并不是超定问题有解的唯一区域。此外,它甚至不是极小化元,这表明具有平坦水平集的解并不总是优化扭转能量的最佳候选。

英文摘要:

In this paper, we study a shape optimization problem for the torsional energy associated with a domain contained in an infinite cylinder, under a volume constraint. We prove that a minimizer exists for all fixed volumes and show some of its geometric and topological properties. As this issue is closely related to the question of characterizing domains in cylinders that admit solutions to an overdetermined problem, our minimization result allows us to deduce interesting consequences in that direction. In particular, we find that, for some cylinders and some volumes, the ``trivial" domain given by a bounded cylinder is not the only domain where the overdetermined problem has a solution. Moreover, it is not even a minimizer, which indicates that solutions with flat level sets are not always the best candidates for optimizing the torsional energy.

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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