Two-based duplicate-clones
Ellen Redi · Proceedings of the Estonian Academy of Sciences Physics Mathematics · 2001
Abstract. The notion “two-based clone ” on a pair of sets (universes) is defined. Some properties of two-based duplicate-clones are proved. The lattice of all double-dually closed duplicate-clones on a pair of 2-element sets is described. Key words: two-based clone, lattice, two-based duplicate-clone, double-dually closed clone. 1.