RT Journal Article T1 Internal labelling problem: an algorithmic procedure A1 Campoamor Stursberg, Otto-Rudwig AB Combining the decomposition of Casimir operators induced by the embedding of a subalgebra into a semisimple Lie algebra with the properties of commutators of subgroup scalars, an analytical algorithm for the computation of missing label operators with the commutativity requirement is proposed.Two new criteria for subgroups scalars to commute are given. The algorithm is completed with a recursive method to construct orthonormal bases of states. As examples to illustrate the procedure, four labelling problems are explicitlystudied. PB IOP Science SN 1751-8113 YR 2011 FD 2011 LK https://hdl.handle.net/20.500.14352/43754 UL https://hdl.handle.net/20.500.14352/43754 LA eng NO UCM-BSCH DS Docta Complutense RD 21 abr 2025