Generating relations for reducing matrices. I. Ordinary representations
Rainer Dirl, Peter Kasperkovitz, Mois Ilia Aroyo, J. N. Kotzev, M. N. Angelova-Tjurkedjieva · Journal of Mathematical Physics · 1986
Auxiliary groups are constructed that make it possible to reduce the multiplicity problem and to derive consistent generating relations for the elements of reducing matrices. Three examples are worked out to illustrate the general scheme.