2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/65403In this paper we solve a problem, originally raised by Grothendieck, on the properties, i.e. Complete intersection, Gorenstein, Cohen--Macaulay, that are conserved under tensor product of algebras over a field $k$.6 pagesCommutative Algebra13H10text