👉 In mathematics, an overfellowlike function is a type of function that behaves differently from its average value. A function f(x) is called an overfellowlike if for any ε > 0, there exists δ > 0 such that |f(x)| ≤ ε whenever |x - x1| < δ. This means that the function's average value (the limit of the difference between each output and its average) approaches zero as the distance between the input and the output approaches