👉 A concept in mathematics, particularly in the field of algebra, that refers to a relation between two sets where one set is an element of another and vice versa. In other words, if x is an element of y, then y is an element of x. For example, consider the set A = {1, 2, 3} and the relation R on this set defined by the following conditions: R: (x, y) ∈ R → x ≤ y In this case
