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arXiv 0708.3489math.SP
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圆盘上Dirichlet-Neumann Laplacian的下特征值的极值

Extrema of low eigenvalues of the Dirichlet-Neumann Laplacian on a disk

Eveline Legendre

摘要:

本文研究了圆盘上Laplacian算子的第一、第二混合特征值在几类Dirichlet-Neumann边界条件下的极值问题。我们证明了所有混合边界条件中第二特征值的极小值存在于一个紧致的单参数族中,并给出了明确的描述。此外,我们证明了在所有分区的边界上的有限数量的部分,Dirichlet和Neumann条件交替施加,第一特征值是最大化的均匀分布的分区。

英文摘要:

We study extrema of the first and the second mixed eigenvalues of the Laplacian on the disk among some families of Dirichlet-Neumann boundary conditions. We show that the minimizer of the second eigenvalue among all mixed boundary conditions lies in a compact 1-parameter family for which an explicit description is given. Moreover, we prove that among all partitions of the boundary with bounded number of parts on which Dirichlet and Neumann conditions are imposed alternately, the first eigenvalue is maximized by the uniformly distributed partition.

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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