English Congruence lattice problem Cited by user TheMathCat on 06 Feb 2022 In mathematics, the congruence lattice problem asks whether every algebraic distributive lattice is isomorphic to the congruence lattice of some other lattice.
English Slim lattice Cited by user David Eppstein on 16 Nov 2016 In lattice theory, a finite lattice is slim if no three join-irreducible elements form an antichain.