fact: Definition smash_hrel : hrel (X × Y) := λ xy₁ xy₂, xy₁ = xy₂ ∨ (product_point_coordinate xy₁ × product_point_coordinate xy₂).
imports: UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.DisplayedCats.Structures.CartesianStructure UniMath.CategoryTheory.DisplayedCats.Structures.StructureLimitsAndColimits