qspec.wigner_6j  (  j1 ,  j2 ,  j3 ,  j4 ,  j5 ,  j6 ,  as_sympy = False  )[source]

Calculate the Wigner-6j symbol $$W_{J_4J_5J_6}^{J_1J_2J_3}\coloneqq \begin{Bmatrix} J_1 & J_2 & J_3 \\ J_4 & J_5 & J_6 \end{Bmatrix}.$$

Parameters:

j1sympy_quant

$J_1$

j2sympy_quant

$J_2$

j3sympy_quant

$J_3$

j4sympy_quant

$J_4$

j5sympy_quant

$J_5$

j6sympy_quant

$J_6$

as_sympybool

Return the result as a symbol (True) or as a float (False).

Returns:

w6sympy_core | float

The Wigner-6j symbol $W_{J_4J_5J_6}^{J_1J_2J_3}$.