Abstract
A new Fortran program called CFPSIF is introduced. Using the new recurrent formula obtained by us the program CFPSIF calculates the fractional parentage coefficients (CFPs) of an identical fermion system with well-defined seniority. The recurrent process is controlled by the multiplicity of the irreducible representations (IRREPs) of group O(3) in the reduction SP ( N) ⊃ O(3). It is shown that the program CFPSIF is more efficient than the program GENESIS, especially for a system with a relatively large number of fermions.
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