fact: Definition O_rec_homotopy {P Q : Type} `{In O Q} (f g : P -> Q) (pi : f == g) : O_rec (O := O) f == O_rec g.
imports: HoTT.Basics HoTT.Types Equiv.BiInv Extensions HProp HFiber NullHomotopy Limits.Pullback PathAny Colimits.Pushout