👉 In mathematics, a "cumulative function" or "cumulative sequence" is a function that assigns values to all elements of an ordered set. It is used in combinatorics and other branches of mathematics to describe the behavior of sequences or series of numbers. For example, the cumulative function f(n) for a given positive integer n can be defined as: f(n) = 0 if n < 1 f(n) = 1/n if n > 1 The sequence