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paper

On the Approximation of Isolated Eigenvalues of Ordinary Differential Operators

arXiv:math/0612622 · doi:10.1090/S0002-9939-08-09140-5

Abstract

We extend a result of Stolz and Weidmann on the approximation of isolated eigenvalues of singular Sturm-Liouville and Dirac operators by the eigenvalues of regular operators.

4 pages