proposition: Lemma size_add p1 p2 : size (add p1 p2) = maxn (size p1) (size p2).
proof: Proof. by rewrite /size /add size_map2. 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