2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/72182Let G denote a connected reductive algebraic group over an algebraically closed field k and let X denote a projective G x G-equivariant embedding of G. The large Schubert varieties in X are the closures of the double cosets BgB, where B denotes a Borel subgroup of G, and g is in G. We prove that these varieties are globally F-regular in positive characteristic, resp. of globally F-regular type in characteristic 0. As a consequence, the large Schubert varieties are normal and14 pagesAlgebraic GeometryRepresentation Theory14M17; 13A35text