Campoamor Stursberg, Otto-Rudwig2023-06-202023-06-2020071313-1311https://hdl.handle.net/20.500.14352/50628We prove that the missing label operators for the state labelling problem in the Wigner supermultiplet model su(2)×su(2) � su(4) can be solved naturally without explicitly using enveloping algebras. Considering a contraction of Lie algebras naturally associated to the reduction chain su(2)×su(2) ,! su(4), we recover the Moshinsky-Nagel operators as functions of the Casimir operators of su(4), the spin-isospin subalgebra and the corresponding inhomogeneous contractionengjournal articlehttp://www.m-hikari.com/astp/astp2007/astp9-12-2007/campoamorASTP9-12-2007http://www.m-hikari.com/restricted access514.154Internal labelCasimirContractionSupermultipletTeoría de los quanta2210.23 Teoría Cuántica