We obtain a simple construction for particular subclasses of several varieties of lattice expansions. The construction allows a unified approach to the characterization of the subdirectly irreducible algebras
In this paper we investigate the class of all modular GMS-algebras which contains the class of MS-algebras. We construct modular GMS-algebras from the variety by means of -quadruples. We also characterize isomorphisms of these algebras by means of -quadruples.
In this paper we obtain the forbidden configuration for 0-distributive lattices.