proposition: Lemma intRS n : n.+1 == n + 1.
proof: Proof. by case: n => [|n] /=; rewrite ?add0R // addRC. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div order) mathcomp(ssralg ssrnum ssrint rat intdiv) Coq(Morphisms Setoid) fourcolor(real realsyntax)