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arXiv 0910.3907math.APmath.SP
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三维细杆中Dirichlet Laplacian特征值的完全渐近展开

Complete asymptotic expansions for eigenvalues of Dirichlet Laplacian in thin three-dimensional rods

D. Borisov, G. Cardone

摘要:

我们考虑三维曲细杆中的Dirichlet Laplacian。杆是有限的。它的横截面是恒定的和小的,并以任意方式沿参考曲线旋转。我们找到了这类算子的特征值的一个双参数集,并构造了它们的完全渐近展开。我们表明,这两个参数集包含任何规定数量的第一特征值的考虑运营商。我们得到了与这些第一特征值相关的特征函数的完全渐近展开。

英文摘要:

We consider Dirichlet Laplacian in a thin curved three-dimensional rod. The rod is finite. Its cross-section is constant and small, and rotates along the reference curve in an arbitrary way. We find a two-parametric set of the eigenvalues of such operator and construct their complete asymptotic expansions. We show that this two-parametric set contains any prescribed number of the first eigenvalues of the considered operator. We obtain the complete asymptotic expansions for the eigenfunctions associated with these first eigenvalues.

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