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Primitive Central Idempotents of Rational Group Algebras (1306.5306v1)
Published 22 Jun 2013 in math.RT and math.RA
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 R\'io, but some unknown scalars are involved. Our description also gives answers to their questions.
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