Representation theory of Lie groups | Rotational symmetry | Monoidal categories

6-j symbol

Wigner's 6-j symbols were introduced by Eugene Paul Wigner in 1940 and published in 1965. They are defined as a sum over products of four Wigner 3-j symbols, The summation is over all six mi allowed by the selection rules of the 3-j symbols. They are closely related to the Racah W-coefficients, which are used for recoupling 3 angular momenta, although Wigner 6-j symbols have higher symmetry and therefore provide a more efficient means of storing the recoupling coefficients. Their relationship is given by: (Wikipedia).

6-j symbol
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Related pages

3-j symbol | Character table | Clebsch–Gordan coefficients | Monoidal category | 9-j symbol | Racah W-coefficient | Graph automorphism | Bialgebra | Grothendieck group | Quantum group | Table of simple cubic graphs | Representation theory