The shape of congruence lattices
Keith A. Kearnes, Emil W. Kiss · Memoirs of the American Mathematical Society · 2012
Key words and phrases. Abelian, almost congruence distributivity, commutator theory, compatible semilattice operation, congruence identity, congruence modularity, congruence semidistributivity, Maltsev condition, meet continuous lattice, rectangulation, residual smallness, solvable, term condition, variety, weak difference term.