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Weakly regular Sturm-Liouville problems: a corrected spectral matrix method (1907.07615v1)
Published 12 Jul 2019 in math.NA and cs.NA
Abstract: In this paper, we consider weakly regular Sturm-Liouville eigenproblems with unbounded potential at both endpoints of the domain. We propose a Galerkin spectral matrix method for its solution and we study the error in the eigenvalue approximations it provides. The result of the convergence analysis is then used to derive a low-cost and very effective formula for the computation of corrected numerical eigenvalues. Finally, we present and discuss the results of several numerical experiments which confirm the validity of the approach.