Calculation of Wigner 3j and 6j symbols using recursion.
Functions for calculating angular momentum coupling coefficients using recurrsion relations. The algorithms used are those of Schulten and Gordon[1] augmented with the relations of Luscombe and Luben[2]. Commentary throughout refers to the paper of Luscombe and Luben (LL98).
This code is in embryonic form at this point in time.
[1] K. Schulten and R. G. Gordon, J. Math. Phys. 16, 1961 (1975). [2] J. H. Luscombe and M. Luben, Phys. Rev. E 57, 7274 (1998).