2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/79130The main object of this paper is to produce a deformation of the KdV hierarchy of partial differential equations. We construct this deformation by taking a certain limit of the Toda hierarchy. This construction also provides a deformation of the Virasoro algebra.Quantum AlgebraAlgebraic Geometrytext