Primitive Central Idempotents of Rational Group Algebras
arXiv:1306.5306 · doi:10.1142/S0219498812501307
Abstract
We give a description of the primitive central idempotents of the rational group algebra QG of a finite group G. Such a description is already investigated by Jespers, Olteanu and del Río, but some unknown scalars are involved. Our description also gives answers to their questions.