fact: Definition skewMonoid_unitr (X : skewMonoid) : ( ρ' X · identity X #⊗ η X · μ X = identity _) := pr2 (pr2 (pr2 X)).
imports: UniMath.Foundations.PartD UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.PrecategoryBinProduct UniMath.CategoryTheory.SkewMonoidal.SkewMonoidalCategories