3-j symbol
COEFFICIENTS COUPLED WITH ANGULAR MOMENTUM
3j symbol; Wigner 3-j symbol; 3j-symbol; 3jm-symbol; 3-jm symbols; Three-j symbol; Wigner 3j-symbol; 3-jm symbol; Wigner 3-j symbols
In quantum mechanics, the Wigner 3-j symbols, also called 3-jm symbols, are an alternative to Clebsch–Gordan coefficients for the purpose of adding angular momenta. While the two approaches address exactly the same physical problem, the 3-j symbols do so more symmetrically.