fact: Definition RoofEqclassDisjoint {x y : ob C} (RE1 RE2 : RoofEqclass x y) (R1 R2 : Roof x y) (H1 : RoofEqclassIn RE1 R1) (H2 : RoofEqclassIn RE2 R2) (H : (make_eqrel _ (RoofEqrel x y)) R1 R2) : RE1 = RE2.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors