2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/139339We characterize the maximum $r$-local index of a Schur algebra over an abelian number field $K$ in terms of global information determined by the field $K$, for $r$ an arbitrary rational prime. This completes and unifies previous results of Janusz and Pendergrass.15 pagesRepresentation TheoryRings and Algebras16K50; 12G05; 16S35text