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