fact: Definition skewmonoidal_assoc (V : skewmonoidal_data) (x y z : V) : x ⊗ y ⊗ z --> x ⊗ (y ⊗ z) := skewmonoidal_assoc_nt V ((x , y) , z).
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