  To find all extreme points of multimodal functions is called extremum
problem, which is a well known difficult issue in optimization fields. Applying
ant colony optimization (ACO) to solve this problem is rarely reported. The
method of applying ACO to solve extremum problem is explored in this paper.
Experiment shows that the solution error of the method presented in this paper
is less than 10^-8. keywords: Extremum Problem; Ant Colony Optimization (ACO)
