2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/146187We will introduce a modified system of A-hypergeometric system (GKZ system) by applying a change of variables for Groebner deformations and study its Groebner basis and the indicial polynomials along the "exceptional hypersurface".8 pagesClassical Analysis and ODEsAlgebraic Geometry33C70text