The Green correspondence for SL(2,p)
Abstract
Let be an odd prime and . Denote the subgroup of upper triangular matrices as . Finally, let be an algebraically closed field of characteristic . The Green correspondence gives a bijection between the non-projective indecomposable modules and non-projective indecomposable modules, realised by restriction and induction. In this paper, we start by recalling a suitable description of the non-projective indecomposable modules for these group algebras. Next, we explicitly describe the Green correspondence bijection by pinpointing the modules' position on the Stable Auslanden-Reiten quivers. Finally, we obtain two corollaries in terms of these descriptions: formulae for lifting the module decomposition of an module, and a complete description of and .
Cite
@article{arxiv.2503.07581,
title = {The Green correspondence for SL(2,p)},
author = {Denver-James Logan Marchment},
journal= {arXiv preprint arXiv:2503.07581},
year = {2025}
}