👉 In mathematics, a manless set is a collection of sets that are disjoint and pairwise non-intersecting. A disjoint union of manless sets is defined as a set whose elements are all the elements in one or more of the sets. For example: - Manless set = {1, 2} - Manless set = {3, 4} A manless set is said to be "manlessly" if it has no elements.