proposition: Lemma size_rec1 F x n: size (rec1 F x n) = n.+1.
proof: Proof. by apply size_rec1up. Qed.
imports: Coq(ZArith Reals) Coquelicot(Coquelicot) mathcomp.ssreflect(ssreflect ssrfun ssrbool eqtype ssrnat seq fintype bigop) Flocq(Core) Stdlib MathComp Interval Xreal Basic_rec