The submaximal clones on the three-element set with finitely many relative R-classes
Erkko Lehtonen, Ágnes Szendrei · Discussiones Mathematicae - General Algebra and Applications · 2010
For each clone C on a set A there is an associated equivalence relation analogous to Green's R-relation, which relates two operations on A if and only if each one is a substitution instance of the other using operations from C. We study the maximal and submaximal clones on a three-element set and determine which of them have only finitely many relative R-classes.