👉 In mathematics, a "underrate" is defined as an element that is not strictly smaller than another element. In other words, it is any element that is less than or equal to another element without being equal to it. For example, in set theory, if we have two sets A and B, then the underrates of A are all elements that are not greater than A but are less than or equal to A. For instance, in set A={a,b,c,d},
