Primitive Central Idempotents Of Rational Group Algebras

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6 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)125-130
Number of pages5
JournalJournal of Algebra and Its Applications
Issue number1
Publication statusPublished - Feb 2013


  • Idempotents
  • group algebras
  • representation theory


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