fact: Definition lunitor_nat {C : category} {tu : tensor_unit C} (lu : lunitor_data tu) : UU := ∏ (x y : C) (f : C⟦x,y⟧), ((identity I_{tu}) ⊗^{tu} f) · (lu y) = (lu x) · f.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Core.Isos