fact: Definition eq_Map2b@{i} {A A' : Type@{i}} {R R' : A -> A' -> Type@{i}} : (forall a a', R a a' <~> R' a a') -> Map2b.Has@{i} R' -> Map2b.Has@{i} R.
imports: Coq(ssreflect) HoTT(HoTT) HoTT_additions Database elpi(elpi)