Editing Clebsch-Gordan coefficients

The Clebsch-Gordan coefficients are defined by

:<math>\Psi_{JM}= \sum_{M=M_1 + M_2} C_{M_1 M_2}^J \Psi_{M_1 M_2},</math>

where <math>J \equiv J_1 + J_2</math> and satisfies <math>(j_1j_2m_1m_2|j_1j_2m)=0</math>
for <math>m_1+m_2\neq m</math>.
They are used to integrate products of three [[spherical harmonics]] (for example the addition of angular momenta).
The Clebsch-Gordan coefficients are sometimes expressed using the related Racah V-coefficients,
<math>V(j_1j_2j;m_1m_2m)</math>
(See also the [[Racah W-coefficients]], sometimes simply called the Racah coefficients).
==References==
#[http://dx.doi.org/10.1016/0010-4655(74)90059-9   Robert E. Beck and Bernard Kolman "Racah's outer multiplicity formula", Computer Physics Communications  '''8''' pp.  95-100 (1974)]
[[category: mathematics]]