Ideals and other generalizations of congruence classes
Paolo Aglianò, Aldo Ursini · Journal of the Australian Mathematical Society Series A Pure Mathematics and Statistics · 1992
Abstract In the general context of ideals in universal algebras, we study varietal properties connected with ideals that are equivalent both to Ma'cev conditions and congruence properties such as 0-regularity, 0-permutability, etc.