2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 | 1998 | 1997 | 1996 | 1995 | 1994 | 1993 | 1992 | 1991 | 1990 | 1989 | 1988 | 1987 | 1986 | 1985 | 1984 | 1983 | 1982 | 1981 | 1980 | 1979 | 1978 | 1977 | 1976 | 1975 | 1974 | 1973 | 1972 | 1971 | 1970 | 1969 | 1968 | 1967 | 1966 | 1965 | 1964 | 1963 | 1962 | 1961 | 500 | 76 | 0

Algebraic manipulation of the states associated with the U(5)set of O(5) set of O(3) chain of groups:orthonormalization and matrix elements

Authors: C. Yannouleas and J.M. Pacheco

Ref.: Computer Physics Communications 54, 315-328 (1989)

Abstract: A collection of procedures able to perform algebraic manipulations for the orthonormalization and for the calculation of matrix elements between the states associated with the U(5)cap O(5)cap (O)3 chain of groups is presented. These procedures combine both the exact and the bigfloat aritmetic modes and thus return arbitrarily accurate results; this is particularly relevant to the Gram-Schmidt orthonormalization, where strong cancellations usually pose serious problems in all floating point implementations.