The analytical Scheme calculator for angular momentum coupling and recoupling coefficients Original Research Article

We describe a Scheme implementation of the interactive environment to calculate analytically the Clebsch–Gordan coefficients, Wigner 6j and 9j symbols, and general recoupling coefficients that are used in the quantum theory of angular momentum. The orthogonality conditions for considered coefficients are implemented. The program provides a fast and exact calculation of the coefficients for large values of quantum angular momenta.