fact: Definition PostSwitch (SOM : SubsetsOfMors) {y z w : ob C} (f g : y --> z) (s : z --> w) (e : SOM z w s) (H : f · s = g · s) : UU := ∑ D : (∑ (x : ob C), C⟦x, y⟧), (SOM (pr1 D) y (pr2 D)) × ((pr2 D) · f = (pr2 D) · g).
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors