# The analytical Scheme calculator for angular momentum coupling and recoupling coefficients

## Description

Abstract 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. Title of program: Scheme2Clebsch Catalogue Id: ADWC_v1_0 Nature of problem The accurate and fast calculation of the angular momentum coupling and recoupling coefficients is required in various branches of quantum many-particle physics. The presented code provides a fast and exact calculation of the angular momentum coupling and recoupling coefficients for large values of quantum angular momenta and is based on the GNU Library General Public License PLT software [1]. Versions of this program held in the CPC repository in Mendeley Data ADWC_v1_0; Scheme2Clebsch; 10.1016/j.cpc.2005.06.003 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)