👉 Complements are terms used in mathematics, specifically in set theory and logic. In set theory, a complement of an element x is defined as the set of all elements that do not have x as a member. For example, let's say we have two sets A = {a} and B = {b}. The complement of b (denoted as B') would be the set of all elements in B but not in A. This means that any element in B is also not an element
