Universal deformation rings and tame blocks
Representation Theory
2014-07-15 v1
Abstract
Let k be an algebraically closed field of positive characteristic, and let W be the ring of infinite Witt vectors over k. Suppose G is a finite group and B is a block of kG of infinite tame representation type. We find all finitely generated kG-modules V that belong to B and whose endomorphism ring is isomorphic to k and determine the universal deformation ring R(G,V) for each of these modules.
Keywords
Cite
@article{arxiv.1309.0153,
title = {Universal deformation rings and tame blocks},
author = {Frauke M. Bleher and Giovanna Llosent and Jennifer B. Schaefer},
journal= {arXiv preprint arXiv:1309.0153},
year = {2014}
}
Comments
14 pages