Brauer relations for finite groups in the ring of semisimplified modular representations
arXiv:1610.07397 · doi:10.1016/j.jalgebra.2018.03.037
Abstract
Let be a finite group and be a prime. We study the kernel of the map, between the Burnside ring of and the Grothendieck ring of -modules, taking a -set to its associated permutation module. We are able, for all finite groups, to classify the primitive quotient of the kernel; that is for each , the kernel modulo elements coming from the kernel for proper subquotients of . We are able to identify exactly which groups have non-trivial primitive quotient and we give generators for the primitive quotient in the soluble case.