Exercise relationalgebra.cnf
Description
To conjunctive normal form
Derivation
Final term is not finished
V \/ ((s ; V-) ; (s /\ q))- /\ s-
⇒ relationalgebra.remredunexprsV \/ (V- ; (s /\ q))- /\ s-
⇒ relationalgebra.remredunexprsV \/ V-- /\ s-
⇒ relationalgebra.doublenegationV \/ V /\ s-
⇒ relationalgebra.remredunexprsV \/ s-