On p-periodicity in the Farrell cohomology of Sp(p-1,Z[1/n])

Research paper by Cornelia M. Busch

Indexed on: 23 Nov '07Published on: 23 Nov '07Published in: Mathematics - Group Theory

Abstract

We describe isomorphism patterns in the $p$-primary part of the Farrell cohomology ring ${\hat{H}}^*(Sp(p-1,Z[1/n]),Z)$ for any odd prime $p$ and suitable integers $0\neq n\in Z$, where $Sp(p-1,Z[1/n])$ denotes the group of symplectic $(p-1)\times (p-1)$--matrices. Moreover, we determine the precise $p$-period of this ring.