On the approximation of isolated eigenvalues of ordinary differential operators

Teschl, Gerald

doi:10.1090/S0002-9939-08-09140-5

On the approximation of isolated eigenvalues of ordinary differential operators
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by Gerald Teschl PDF

Proc. Amer. Math. Soc. 136 (2008), 2473-2476 Request permission

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.

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