Geodesic
Completeness of the $3j$-symbols for $SL(2,\mathbb C)$ group
Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 26, Tome 487 (2019), pp. 40-52 
N. M. Belousov; S. È. Derkachev. Completeness of the $3j$-symbols for $SL(2,\mathbb C)$ group. Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 26, Tome 487 (2019), pp. 40-52. http://geodesic.mathdoc.fr/item/ZNSL_2019_487_a2/
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

The main formulas for the unitary series of representations of the group $SL(2,\mathbb C)$ are given, and the decomposition of a tensor product of two representations into irreducible is considered. A simple proof of completeness of the $3j$-symbols is given.

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