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FilledSmallSquareSixJSymbol[, , , , , ] gives the values of the Racah 6-j symbol.

FilledSmallSquare The 6-j symbols vanish except when certain triples of the satisfy triangle inequalities.

FilledSmallSquare The parameters of SixJSymbol can be integers, half-integers or symbolic expressions.

FilledSmallSquare See The Mathematica Book: Section 3.2.5.

FilledSmallSquare See also: ThreeJSymbol, ClebschGordan.