fact: Definition iskfinite_coprod {X Y : UU} : iskfinite X → iskfinite Y → iskfinite (X ⨿ Y) := hinhfun2 kfinstruct_coprod.
imports: UniMath.Foundations.Propositions UniMath.MoreFoundations.PartA UniMath.MoreFoundations.Notations UniMath.Combinatorics.FiniteSets UniMath.Combinatorics.StandardFiniteSets