Equational Classes of Lattices
George Grätzer · Birkhäuser Basel eBooks · 1978
In this section we shall discuss the basic properties of equational classes of lattices. Of the four characterizations and descriptions given, three apply to arbitrary equational classes of universal algebras; the fourth is valid only for those equational classes of universal algebras that are congruence distributive (that is, the congruence lattice of any algebra in the class is distributive). For the sake of simplicity, all these results are stated and proved only for lattices.