fact: Definition associator_REL : associator_data tensor_data_REL := λ X Y Z xyz₁ xyz₂, ((pr11 xyz₁ = pr1 xyz₂) ∧ (pr21 xyz₁ = pr12 xyz₂) ∧ (pr2 xyz₁ = pr22 xyz₂))%logic.
imports: UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Categories.Rel UniMath.CategoryTheory.Adjunctions.Core UniMath.CategoryTheory.Monoidal.WhiskeredBifunctors UniMath.CategoryTheory.Monoidal.Categories UniMath.CategoryTheory.Monoidal.Structure.Symmetric UniMath.CategoryTheory.Monoidal.Structure.Closed