proposition: Lemma sqr_normc (x : R[i]) : (`|x| ^+ 2) = x * x^*%C.
proof: Proof. by rewrite normcE sqr_sqrtc. 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)