At first, the article gives a careful consideration equally to the effect that the debt capital makes the maximum of enterprise value arising from the two aspects of the profit of enterprise and the cost of bankrupt.

The new concepts of quality utility and quality utility function are put forward, the index of quality characteristic coffcient is set up, the several mathematical models of the maximum of quality utility are given.

For a long time,whether taking the maximum profit of the stock-holders or the value of the interest-related persons as the company goal varies at different stages and causes controversies among the scholars and persons concerned.

The Shortcat for Contemporary Young Students to Maximize the Value of Life;

It introduces the role of cost management plays in program construction management,and analyses how to strengthen construction program cost management from strengthening cost idea,setting up cost responsibility system,making construction plan,making safe and civilized constructing,so as to realize maximize program economic benefit.

A Study on Posner s Utility Maximization;

The Analysis of the Optimal Retiring Age Based on the Maximization of Individual Utility

The four economics concepts which are transaction costs,maximization,equilibrium and efficiency lead to the birth of the Economic Analysis of Law.

In this paper, the steepest descent arithmetic is used.