ThreeJSymbol
 Usage
• ThreeJSymbol[{ ,  }, { ,  }, { ,  }] gives the values of the Wigner 3-j symbol.
Notes
• The 3-j symbols vanish except when  and the  satisfy a triangle inequality. • The parameters of ThreeJSymbol can be integers, half-integers or symbolic expressions. • The Clebsch-Gordan coefficients and 3-j symbols in Mathematica satisfy the relation  . • New in Version 2.
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