proposition: Lemma Rnonneg_convex : is_convex_set (fun x => 0 <= x)%coqR.
proof: Proof. apply/asboolP=> x y t Hx Hy; apply addR_ge0; exact/mulR_ge0. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg fingroup perm matrix) mathcomp(mathcomp_extra boolp classical_sets Rstruct) mathcomp(ssrnum ereal) mathcomp(lra Rstruct reals) Reals ssrR Reals_ext Ranalysis_ext ssr_ext ssralg_ext logb realType_ext fdist