2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/64753We study the Ekedahl-Oort stratification on moduli spaces of PEL type. The strata are indexed by cosets in a Weyl group. The main result of this paper is that the dimension of a stratum equals the length of the corresponding Weyl group element. We also discuss some explicit examples.Plain TeX, 23 pages, 5 postscript figures; this is a completely revised version of results that were earlier included in math.AG/0203288Algebraic Geometry14G35, 14K10, 14L05, 14L15text