Computational Mathematics and Mathematical Physics

, Volume 50, Issue 4, pp 646–664

Perturbed boundary eigenvalue problem for the Schrödinger operator on an interval


DOI: 10.1134/S096554251004007X

Cite this article as:
Khusnullin, I.K. Comput. Math. and Math. Phys. (2010) 50: 646. doi:10.1134/S096554251004007X


A perturbed two-parameter boundary value problem is considered for a second-order differential operator on an interval with Dirichlet conditions. The perturbation is described by the potential μ−1V((xx0−1), where 0 < ɛ ≪ 1 and μ is an arbitrary parameter such that there exists δ > 0 for which ɛ/μ = oδ). It is shown that the eigenvalues of this operator converge, as ɛ → 0, to the eigenvalues of the operator with no potential. Complete asymptotic expansions of the eigenvalues and eigenfunctions of the perturbed operator are constructed.

Key words

second-order differential operatorsingular perturbationeigenvalueasymptotics

Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  1. 1.Bashkir State Pedagogical UniversityUfaBashkortostan, Russia