proposition: Lemma fmorph_rat (aR : fieldType) rR (f : {rmorphism aR -> rR}) a : f (ratr _ a) = ratr _ a.
proof: Proof. by rewrite fmorph_div !rmorph_int. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop order ssralg countalg div ssrnum) mathcomp(ssrint prime archimedean)