2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/71950In the paper we presnt a solution of problem 31 of chaptr 8 of the monograph of K. Denecke and S. L. Wismath: Hypridentities and clones, Gordon & Breach, 2000, by presnting two main theorems on hyperbasis for hypervarieties and hyperquasivarieties.the paper is submitted to Contributions to General Algebra 16Rings and Algebras08C15, 08C99text