author: representations summer research institute on cohomology

Group Representations: Cohomology, Group Actions and Topology: Cohomology, Group Actions, and Topology : Summer Research Institute on Cohomology, Representations, and Actions of Finite Groups, July 7-27, 1996, University of Washington, Seattle

... D&D induces a map u : U – U2U such that (6 & 6)u = 06. PRooF. Because Ho(D) = U and Ho(D&D) = U & U, we know that a induces a map u : U – U & U such that ué = ( & e)ao. Let s e T, and set S = {s} so that Xs is a summand of Do. Then the ...

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