CLONES OF ALGEBRAS WITH PARALLELOGRAM TERMS
Keith A. Kearnes, Ágnes Szendrei · International Journal of Algebra and Computation · 2011
We describe a manageable set of relations that generates the finitary relational clone of an algebra with a parallelogram term. This result applies to any algebra with a Maltsev term and to any algebra with a near unanimity term. One consequence of the main result is that on any finite set and for any finite k there are only finitely many clones of algebras with a k-ary parallelogram term which generate residually small varieties.