(For other notation see Notation for the Special Functions.)
The main functions treated in this chapter are the Wigner symbols, respectively,
The most commonly used alternative notation for the symbol is the Clebsch–Gordan coefficient
see Edmonds (1974, p. 46, Eq. (3.7.3)) and Rotenberg et al. (1959, p. 1, Eq. (1.1a)). For other notations for , , symbols, see Edmonds (1974, pp. 52, 97, 104–105) and Varshalovich et al. (1988, §§8.11, 9.10, 10.10).