proposition: Theorem Rmorph_toP : Real.morphism Rmorph_to.
proof: Proof. by []. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq order) mathcomp(ssralg ssrnum ssrint rat) Coq(Morphisms Setoid) fourcolor(real realsyntax realprop)