proposition: Lemma plus_le_compat: forall x y a b, x <= y -> a <= b -> x + a <= y + b.
proof: Proof. Proof binop_le_compat Qplus QnonNeg.Qplus_nonneg Qplus_comm Qplus_wiggle. Lemma Qle_0_1: (0 <= 1)%Q. Proof. discriminate. Qed.
imports: Coq.QArith.Qabs CoRN.model.ordfields.Qordfield CoRN.model.structures.Qpossec Coq.QArith.Qminmax Coq.setoid_ring.Ring Coq.Program.Program