👉 A maximum is a point in a set of numbers where all values are greater than or equal to it. In other words, the maximum of a set of real numbers is the highest number that is less than or equal to every number in the set. For example, if we have a set of integers {1, 2, 3, 4, 5}, then the maximum of this set would be 5 because it is greater than or equal to all other numbers in the set