proposition: Lemma Re_conj z : 'Re z^* = 'Re z.
proof: Proof. by rewrite !ReE addrC conjCK. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)