In mathematical analysis, the maxima and minima of a function, known
collectively as extrema ... Similarly, the function has a local minimum point at x∗ if
f(x∗) ≤ f(x) for all x in X within distance ε of x∗. ... So a method of finding a global
maximum (or minimum) is to look at all the local maxima (or minima) in the
interior, and ...