proposition: Lemma ImMl : {in real, forall x, {morph Im : z / x * z}}.
proof: Proof. by move=> x Rx z; rewrite !ImE rmorphM /= (conj_Creal Rx) -mulrBr mulrCA !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)