Use of second derivative in max-min problems.

Description
The critical points or the maximum and minimum points and the saddle points are defined and explained by solving some problems. Use of second derivative in max-min problems is shown with the help of example sums. The rules of local maximization and minimization are stated.
Prof. Denis Auroux, Maths, Fall 2007,18.02 Multivariable Calculus: 10: Second Derivative Test, Massachusetts Institute of Technology: MIT OpenCourseWare),http://ocw.mit.edu (Accessed August 16,2011). License: Creative Commons BY-NC-SA:http://ocw.mit.edu/terms/#cc