Abstract
For connected reductive groups G over a finite extension F of and L the maximal unramified extension of F we study the sets of elements with given Hodge points . We explain the relationship to stratifications of some moduli scheme of abelian varieties defined by Goren and Oort respectively Andreatta and Goren. We show that for sufficiently large N the Newton point is constant on the sets and compute such N for certain classes of groups.
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