# A new version of CFPSIB: fractional parentage of an identical boson system

## Description

Abstract A new version of the program CFPSIB is introduced. Using the same recurrent formula as that used in the program CFPSIB, but a different calculation procedure, the fractional parentage coefficients (CFPs) of an identical boson system with well-defined seniority can be evaluated by this new program. It is shown that this new version (named RCFPSIB) is more efficient than the program CFPSIB, especially for a system including a relatively large number of bosons, each with higher angular momentum ... Title of program: RCFPSIB Catalogue Id: ACGW_v2_0 [ADAA] Nature of problem The program calculates all the coefficients of fractional parentage (CFP)[1] of identical boson system, by using the recurrent relations[2] with well-defined seniority. CFP's are the expansion coefficients of symmetrized n-body wave functions in terms of the symmetrized (n-1)- body wave functions and the wave function of the nth boson. It is of fundamental importance in constructing a many-boson wave function with well-defined permutational symmetry and total angular momentum, and in calculating ... Versions of this program held in the CPC repository in Mendeley Data ACGW_v1_0; CFPSIB; 10.1016/0010-4655(92)90098-J ACGW_v2_0; RCFPSIB; 10.1016/0010-4655(94)00122-I This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)