proposition: Lemma conjCN1 : (- 1)^* = - 1 :> C.
proof: Proof. exact: rmorphN1. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)