proposition: Lemma ReMl : {in real, forall x, {morph Re : z / x * z}}.
proof: Proof. by move=> x Rx z /=; rewrite !ReE rmorphM /= (conj_Creal Rx) -mulrDr -mulrA. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)