fact: Definition RoofEqClassIn {x y : ob C} (R1 R2 R3 : Roof x y) (H1 : RoofEqclassIn (RoofEqclassFromRoof R1) R2) (H2 : (make_eqrel _ (RoofEqrel x y)) R2 R3) : RoofEqclassIn (RoofEqclassFromRoof R1) R3.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors