FDEXTR swMATH ID: 269 Software Authors: A.G. Abrashkevich, D.G. Abrashkevich Description: FDEXTR 2.1: A new version of a program for the finite-difference solution of the coupled-channel Schrodinger equation using the Richardson extrapolation. A FORTRAN-77 program is presented which solves the Sturm-Liouville problem for a system of coupled second-order differential equations by the finite difference method of the second order using the iterative Richardson extrapolation of the difference eigensolutions on a sequence of doubly condensed meshes. The same extrapolational procedure and error estimations are applied to the eigenvalues and eigenfunctions. Zero-valued (Dirichlet) or zero-gradient (Neumann) boundary conditions are considered. Homepage: http://cpc.cs.qub.ac.uk/summaries/ACVG_v2_0.html Programming Languages: Fortran. Operating Systems: UNIX4.0, AIX3.2.5, SunOS4.1.2, HP/UX9.01, Irix4.05. Keywords: General purpose; Richardson extrapolation; Finite difference method; Schrodinger equation; Eigensolutions; Ordinary; Differential equations; Atomic; Molecular; Chemical physics. Related Software: Cited in: 1 Publication Standard Articles 1 Publication describing the Software, including 1 Publication in zbMATH Year FDEXTR, a program for the finite-difference solution of the coupled-channel Schrödinger equation using Richardson extrapolation. Zbl 0877.65057Abrashkevich, A. G.; Abrashkevich, D. G. 1994 Cited by 2 Authors 1 Abrashkevich, A. G. 1 Abrashkevich, D. G. Cited in 1 Serial 1 Computer Physics Communications Cited in 2 Fields 1 Ordinary differential equations (34-XX) 1 Numerical analysis (65-XX) Citations by Year