fact: Definition equiv_to_O_O_inverts {A B : Type} `{In O A} (f : A -> B) `{O_inverts f} : A <~> O B := Build_Equiv _ _ _ (isequiv_to_O_O_inverts f).
imports: HoTT.Basics HoTT.Types Equiv.BiInv Extensions HProp HFiber NullHomotopy Limits.Pullback PathAny Colimits.Pushout