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