👉 In mathematics, an undecreasing function is a continuous function whose value does not decrease as its argument increases. This means that for any given x in the domain of the function, there exists some y between x and x+1 such that f(x) < f(y). In other words, if you have a function f(x), then for every x in the domain of f, there is an x' in the domain of f such that f(x') > f(x). For example