proposition: Lemma intRB1 m : (m - 1)%R == m - 1.
proof: Proof. exact: intRB. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div order) mathcomp(ssralg ssrnum ssrint rat intdiv) Coq(Morphisms Setoid) fourcolor(real realsyntax)