proposition: Lemma ger0_le_norm : {in nneg &, {mono (@normr _ R) : x y / x <= y}}.
proof: Proof. by move=> x y; rewrite !nnegrE => x0 y0; rewrite !ger0_norm. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)