Integral $Ext^2$ between hook Weyl modules

Dimitra-Dionysia Stergiopoulou

doi:10.1007/s10468-020-10005-x

paper

Integral $E x t^{2}$ between hook Weyl modules

arXiv:2006.03640 · doi:10.1007/s10468-020-10005-x

Abstract

This paper concerns representations of the integral general linear group. The extension groups $E x t^{2}$ between any pair of hook Weyl modules are determined via a detailed study of cyclic generators and relations associated to certain extensions. As a corollary, the modular extension groups $E x t^{1}$ between such modules are determined.

22 pages

Integral Ext2 between hook Weyl modules

Abstract

References in corpus (2)

Integral $E x t^{2}$ between hook Weyl modules