Integral Ext2 between hook Weyl modules
Abstract
This paper concerns representations of the integral general linear group. The extension groups Ext2 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 Ext1 between such modules are determined.
0
Turn this paper into a lesson
ArcXiv compiles a structured reading guide from this paper's metadata: plain-English importance, contributions, prerequisite concepts, which sections to read first, flashcards, and a quiz. Grounded in the abstract, never invented.