On stability and nonvanishing of homomorphism spaces between Weyl modules

Charalambos Evangelou, Mihalis Maliakas, Dimitra-Dionysia Stergiopoulou

Consider the general linear group $G=G{L}_n(K)$ defined over an infinite field $K$ of positive characteristic $p$. We denote by $\Delta (\lambda )$ the Weyl module of $G$ which corresponds to a…