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Resumen de Describing units of integral group rings up to commensurability

Florian Eisele, Ann Kiefer, Inneke van Gelder

  • We restrict the types of 2×22×2-matrix rings which can occur as simple components in the Wedderburn decomposition of the rational group algebra of a finite group. This results in a description up to commensurability of the group of units of the integral group ring ZGZG for all finite groups G that do not have a non-commutative Frobenius complement as a quotient.


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