On Regular and Singular Perturbations of the Eigenelements of the Laplacian



We discuss the concept of singularly perturbed eigenvalue problems for the Laplace operator.

Typical problems are the boundary value problems for the eigenvalue equations in bounded domains and the possible perturbations are a small parameter at higher derivatives, small holes, thin slits, thin appendices, frequent alternation of boundary conditions, etc. The main feature of these problems is that there exists no change of variables reducing them to problems in a fixed domain with a regularly perturbed operator. At the same time, the eigenvalues of such singularly perturbed boundary value problems converge to those of certain limiting problems. This is why, in the sense of convergence, the eigenvalues behave in the regular way.


Asymptotic Expansion Bounded Domain Singular Perturbation Helmholtz Resonator Regular Perturbation 
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© Birkhäuser Boston, a part of Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Bashkir State Pedagogical UniversityUfaRussia

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