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arXiv math/0605786math.AP
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多薄区域上Laplacian问题特征值的渐近分析

Asymptotic Analysis of the Eigenvalues of a Laplacian Problem in a Thin Multidomain

Antonio Gaudiello, Ali Sili

摘要:

考虑$R^N$的薄多畴,N>1,由两个垂直圆柱体组成,一个放置在另一个上面:第一个具有给定的高度和小的截面,第二个具有小的厚度和给定的截面.在这个多区域中,我们研究了当两个圆柱体的体积为零时,Laplacian本征值问题和特征向量的$L^2$ -Hilbert规范正交基的渐近行为。我们得到了极限本征值问题(这是很好地设置在联盟的极限域,分别与1和N-1)和极限基。我们讨论的极限模型,我们精确的这些限制取决于尺寸N和两个圆柱体的体积之间的比率的限制。

英文摘要:

We consider a thin multidomain of $R^N$, N>1, consisting of two vertical cylinders, one placed upon the other: the first one with given height and small cross section, the second one with small thickness and given cross section. In this multidomain we study the asymptotic behavior, when the volumes of the two cylinders vanish, of a Laplacian eigenvalue problem and of a $L^2$-Hilbert orthonormal basis of eigenvectors. We derive the limit eigenvalue problem (which is well posed in the union of the limit domains, with respective dimension 1 and N-1) and the limit basis. We discuss the limit models and we precise how these limits depend on the dimension N and on limit of the ratio between the volumes of the two cylinders.

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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