English

The $A$-fibered Burnside ring as $A$-fibered biset functor in characteristic zero

Representation Theory 2020-09-30 v2 Group Theory Rings and Algebras

Abstract

Let AA be an abelian group such that Hom(G,A)\mathrm{Hom}(G,A) is finite for all finite groups GG, and let K\mathbb{K} be a field of characteristic zero containing roots of unity of all orders equal to finite element orders in AA. In this paper we prove foundational properties of the AA-fibered Burnside ring functor BKAB_{\mathbb{K}}^A as an AA-fibered biset functor over K\mathbb{K}. This includes the determination of the lattice of subfunctors of BKAB_{\mathbb{K}}^A and the determination of the composition factors of BKAB_{\mathbb{K}}^A. The results of the paper extend results of Co\c{s}kun and Y\i lmaz for the AA-fibered Burnside ring functor restricted to pp-groups and results of Bouc in the case that AA is trivial, i.e., the case of the Burnside ring functor over fields of characteristic zero.

Keywords

Cite

@article{arxiv.1909.06668,
  title  = {The $A$-fibered Burnside ring as $A$-fibered biset functor in characteristic zero},
  author = {Robert Boltje and Deniz Yılmaz},
  journal= {arXiv preprint arXiv:1909.06668},
  year   = {2020}
}

Comments

26 pages, referee comments incorporated, consolidated prerequisites from previous Sections 2--4 to Section 2, changed abstract slightly, accepted by Algebras and Representation Theory