proposition: Lemma Plus_rw : forall alpha beta, cnf (alpha + beta) = (cnf alpha + cnf beta)%t1.
proof: Proof. now destruct alpha, beta. Qed.
imports: Coq(Arith Max Bool Lia Compare_dec Relations Ensembles ArithRing Wellfounded Operators_Properties Logic.Eqdep_dec) hydras(Prelude.More_Arith Prelude.Restriction Prelude.DecPreOrder ON_Generic OrdNotations)