proposition: Lemma prob_divRposxxy (x y : Rpos) : (0 <= x / (x + y) <= 1)%coqR.
proof: Proof. have [] := oprob_divRposxxy x y. move/RltP/Order.POrderTheory.ltW/RleP => ?. move/RltP/Order.POrderTheory.ltW/RleP => ?. by []. Qed.
imports: mathcomp(all_ssreflect) mathcomp(all_algebra vector reals normedtype) mathcomp(mathcomp_extra boolp) mathcomp(Rstruct) ssrR realType_ext Reals Lra mathcomp(lra)