proposition: Lemma included_FNth' : forall n, included R' (Dom (Fnth n)) -> included R' (Dom F).
proof: Proof. auto. 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)