proposition: Lemma normc_def (z : R[i]) : `|z| = (sqrtr ((Re z)^+2 + (Im z)^+2))%:C.
proof: Proof. by case: z. Qed.
imports: HB(structures) mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq choice fintype) mathcomp(bigop order ssralg ssrint div ssrnum rat poly closed_field) mathcomp(polyrcf matrix mxalgebra tuple mxpoly zmodp binomial realalg) mathcomp(mxpoly)