Abstract: A method for converting a mathematical optimization problem into an object program for a mathematical programming problem. A processor stores, in an object, information on each of components from deblocking of a mathematical expression representing a mathematical model corresponding to a mathematical optimization problem, and holds objects in association with each other through a connecting node as a tree structure in which an object corresponding to the mathematical model is taken as a root node and an object pertaining to each component from the deblocked mathematical expression is taken as a leaf node.