exact and_congr Iff.rfl Iff.rfl
α : Type u_1
β : Type u_2
r : α → β → Prop
bs : List β
a : α
as : List α
h_ind : List.forAllRel (flip r) bs as = List.forAllRel r as bs
⊢ forAll (fun x => flip r x a) bs ∧ List.forAllRel r as bs ↔ forAll (r a) bs ∧ List.forAllRel r as bs
no goals