proposition: Lemma H5loss_draw_le ht i l : Hiv (i :: l) -> ht_valid ht -> f1 i <= draw -> f2 eloss edraw ht i <= drawwin.
proof: Proof. move=> Hiv Hv. case: f1 (@H5loss_draw_loss ht i l Hiv Hv) (@H5loss_draw_draw ht i l Hiv Hv) => //. by move=> /(_ (refl_equal _))->. by move=> _ /(_ (refl_equal _)) /andP[]. Qed.
imports: HB(structures) mathcomp(all_ssreflect) mathcomp(all_algebra)