Exercise relationalgebra.cnf

Description
To conjunctive normal form

Derivation

(V- ; s)- \/ (V- ; (s /\ q))- /\ s-
relationalgebra.remredunexprs
(V- ; s)- \/ V-- /\ s-
relationalgebra.doublenegation
(V- ; s)- \/ V /\ s-
relationalgebra.remredunexprs
(V- ; s)- \/ s-