Exercise relationalgebra.cnf

Description
To conjunctive normal form

Derivation

V-- \/ ((s ; V-) ; (s /\ q))- /\ s-

⇒ relationalgebra.remredunexprs

V-- \/ (V- ; (s /\ q))- /\ s-

⇒ relationalgebra.remredunexprs

V-- \/ V-- /\ s-

⇒ relationalgebra.doublenegation

V-- \/ V /\ s-

⇒ relationalgebra.remredunexprs

V-- \/ s-