👉 In mathematics, an exchangeable pair of elements in a set is a pair where the first element and the second element are considered interchangeable. This means that they can be exchanged without changing their values or positions in the set. For example, consider two sets A and B: A = {1, 2, 3} B = {4, 5, 6} In this case, (1, 4) is an exchangeable pair of elements from A to B because it