proposition: Proposition isaprop_is_absolute_left_lifting {B : bicat} {x y z : B} {f : z --> x} {g : y --> x} {h : z --> y} {τ : f ==> h · g} (Hτ : is_left_lifting f g τ) : isaprop (is_absolute_left_lifting Hτ).
proof: Proof. do 2 (use impred ; intro). apply isaprop_preserves_is_left_lifting. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Prelude UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Examples.OpMorBicat UniMath.Bicategories.Core.Examples.OpCellBicat