Module Type fc_weak_sig.
Definition AnnIso_respects_atoms_eq   := third  ann_respects_atoms_eq_mutual.
Definition AnnDefEq_respects_atoms_eq := fourth ann_respects_atoms_eq_mutual.

Axiom AnnIso_weaken_available :
forall G D g A B, AnnIso G D g A B -> AnnIso G (dom G) g A B.