Central idempotents of the bifree and left-free double Burnside ring

Published 14 Aug 2012 in math.RT, math.KT, and math.RA | (1208.2940v2)

Abstract: We determine the blocks, i.e., the primitive central idempotents, of the bifree double Burnside ring $B^\Delta(G,G)$ and the left-free double Burnside ring $B^{{\trl}(G,G)$,} as well as the primitive central idempotents of the algebras arising from scalar extension to $\QQ$.

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