Exercise relationalgebra.cnf
Description
To conjunctive normal form
Derivation
(V- ; s)- \/ ((s ; V-) ; (s /\ q) \/ s)-
⇒ relationalgebra.remredunexprsV-- \/ ((s ; V-) ; (s /\ q) \/ s)-
⇒ relationalgebra.doublenegationV \/ ((s ; V-) ; (s /\ q) \/ s)-
⇒ relationalgebra.remredunexprsV