On the approximation of isolated eigenvalues of ordinary differential operators
Authors:
Gerald Teschl
Affiliation:
Faculty of Mathematics, Nordbergstrasse 15, 1090 Wien, Austria; and International Erwin Schrödinger Institute for Mathematical Physics, Boltzmanngasse 9, 1090 Wien, Austria
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.