proposition: Lemma ReMir x : 'Re (x * 'i) = - 'Im x.
proof: Proof. by rewrite mulrC ReMil. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)