2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/75908The main new notions are the notions of tangent-like spaces and local monoids. The main result is the pasage from a local monoid to its tangent-like space which is a local Leibniz algebra.8 pagesRings and AlgebrasDifferential Geometry16W99text