An object-oriented C++ implementation of Davidson method for finding a few selected extreme eigenpairs of a large, sparse, real, symmetric matrix
Description
Abstract A C++ class named Davidson is presented for determining a few eigenpairs with lowest or alternatively highest values of a large, real, symmetric matrix. The algorithm described by Stathopoulos and Fischer is used. The exception mechanism is involved to report the errors. The class is written in ANSI C++, so it is fully portable. In addition a console program as well as a program with graphical user interface for Microsoft Windows is attached, which allow one to calculate the lowest eigenstate... Title of program: Davidson Catalogue Id: ADZM_v1_0 Nature of problem Finding a few extreme eigenpairs of a real, symmetric, sparse matrix. Examples in quantum optics (interaction of matter with a laser field). Versions of this program held in the CPC repository in Mendeley Data ADZM_v1_0; Davidson; 10.1016/j.cpc.2007.06.003 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)