👉 In mathematics, a "nincum" is an abstract concept in set theory. It is defined as a class of sets that contains all finite unions and finite intersections of elements from another set. For example, if you have the set {1, 2}, then the nincum containing all elements of this set would be {1, 2} itself. This class represents all possible union and intersection relationships between elements in a given set. Nincums are useful because they allow for
