proposition: Lemma coeff_fgnormE D z : coeff z (fgnorm D) = `|coeff z D|.
proof: Proof. by rewrite fgmap_f0_coeffE ?mulr1n // normr0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop order generic_quotient) mathcomp(ssralg ssrnum ssrint)