Before revision: Variants Post Clones requiring the constant functionsIf one only considers clones that are required to contain the constant functions, the classification is much simpler: there are only 7 such clones: UM, Λ, V, U, A, M, and ⊤.
After revision: Variants Subset of Post's lattice showing only the 7 clones containing all constant functions Clones requiring the constant functionsIf one only considers clones that are required to contain the constant functions, the classification is much simpler: there are only 7 such clones: UM, Λ, V, U, A, M, and ⊤.