2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54512We analyze GKZ(Gel'fand, Kapranov and Zelevinski) hypergeometric systems and apply them to study the quantum cohomology rings of Calabi-Yau manifolds. We will relate properties of the local solutions near the large radius limit to the intersection rings of a toric variety and of a Calabi-Yau hypersurface. (Talk presented at "Frontiers in Quantum Field Theory", Osaka, Japan, Dec.1995)10 pages, uses sprocl.styHigh Energy Physics - Theorytext