proposition: Lemma assoc_left_ok: functor_on_objects assoc_left = λ c, (ob1 (ob1 c) ⊗ ob2 (ob1 c)) ⊗ ob2 c.
proof: Proof. apply idpath. Qed.
imports: UniMath.Foundations.PartD UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.ProductCategory UniMath.CategoryTheory.PrecategoryBinProduct UniMath.CategoryTheory.whiskering