The structure of projective indecomposable modules for $A_n$, $n\le 12$

Abstract

This article gives the structure of all projective indecomposable modules in blocks with non-cyclic defect group for $n\le 11$, and almost all in the case of $n=12$, leaving four simple modules for $p=2$ and one simple module for $p=3$.

31 pages

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