proposition: Lemma nonRealCi : ('i : C) \isn't real.
proof: Proof. by rewrite realEsqr sqrCi oppr_ge0 lt_geF ?ltr01. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)