# Spectral: Solving Schroedinger and Wheeler–DeWitt equations in the positive semi-axis by the spectral method

## Description

Abstract The Galerkin spectral method can be used for approximate calculation of eigenvalues and eigenfunctions of unidimensional Schroedinger-like equations such as the Wheeler–DeWitt equation. The criteria most commonly employed for checking the accuracy of results is the conservation of norm of the wave function, but some other criteria might be used, such as the orthogonality of eigenfunctions and the variation of the spectrum with varying computational parameters, e.g. the number of basis functio... Title of program: Spectral Catalogue Id: AEQQ_v1_0 Nature of problem Numerical solution of Schrödinger-like eigenvalue equations (specially, the Wheeler-DeWitt equation) in the positive semi-axis. Versions of this program held in the CPC repository in Mendeley Data AEQQ_v1_0; Spectral; 10.1016/j.cpc.2013.09.007 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)