proposition: Lemma size_div_mixed_r u p b : size (div_mixed_r u p b) = size p.
proof: Proof. by elim: p => [//|x p IHp]; rewrite /= IHp. 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