Exercise relationalgebra.cnf
Description
To conjunctive normal form
Derivation
r ; (s /\ s) \/ s /\ q ! I
⇒ relationalgebra.idempotencyandr ; s \/ s /\ q ! I
⇒ relationalgebra.unionoverintersec(r ; s \/ s) /\ (r ; s \/ q ! I)
Description
To conjunctive normal form