proposition: Lemma included_FMult : included R' P -> included R' Q -> included R' (Dom Fmult).
proof: Proof. intros; simpl in |- *; apply included_conj; assumption. Qed.
imports: CoRN.tactics.CornTac CoRN.algebra.CSums CoRN.algebra.CAbMonoids Coq.Sorting.Permutation CoRN.util.SetoidPermutation Coq.Setoids.Setoid Coq.Classes.Morphisms Coq(Lia)