(* Autor(s): Andrej Dudenhefner (1) Affiliation(s): (1) Saarland University, Saarbrücken, Germany *)
Local Notation "A ≡ B" := (mset_eq A B) (at level 65).
Arguments mset_eq !A !B.

Lemma eq_Forall_iff {A B} : A ≡ B -> forall P, (Forall P A <-> Forall P B).