saddle-point theory

saddle-point theory

[′sad·əl ¦pȯint ‚thē·ə·rē]
(mathematics)
The study of differentiable functions and their derivatives from the viewpoint of saddle points, especially applicable to the calculus of variations.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.