fact: Definition tensor_id {C : category} (T : tensor C) : tensor_idax T := pr1 (tensor_to_ax T).
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Core.Isos