Asymptotics of Dirichlet eigenvalues and eigenfunctions of the Laplacian on thin domains in R^d

Details Asymptotics of Dirichlet eigenvalues and eigenfunctions of the Laplacian on thin domains in R^d Asymptotics of Dirichlet eigenvalues and eigenfunctions of the Laplacian on thin domains in R^d

2009-08-17

arxiv.org/abs/0908.2327v1

Mathematics

Analysis of PDEs

Scientific paper

We consider the Laplace operator with Dirichlet boundary conditions on a domain in R^d and study the effect that performing a scaling in one direction has on the eigenvalues and corresponding eigenfunctions as a function of the scaling parameter around zero. This generalizes our previous results in two dimensions and, as in that case, allows us to obtain an approximation for Dirichlet eigenvalues for a large class of domains, under very mild assumptions. As an application, we derive a three--term asymptotic expansion for the first eigenvalue of d-dimensional ellipsoids.

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