An Extended Pruess Method for Sturm-Liouville Problems

preprint2016arXivOpen access

Abstract

A new version of the piecewise approximation (Pruess) method is developed for calculating eigenvalues of Sturm-Liouville problems. The usual piecewise constant or piecewise linear potential approximations are replaced by translates of 2/cos2(x)2/cos^2(x), whose corresponding eigenvalue equation has elementary solutions.

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