Closure operators on algebras
Agata Pilitowska, Anna Zamojska-Dzienio · International Journal of Algebra and Computation · 2015
We study connections between closure operators on an algebra (A, Ω) and congruences on the extended power algebra defined on the same algebra. We use these connections to give an alternative description of the lattice of all subvarieties of semilattice ordered algebras.