Generalized Trajectory Methods for Finding Multiple Extrema and Roots of Functions
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Two generalized trajectory methods are combined to provide a novel and powerful numerical procedure for systematically finding multiple local extrema of a multivariable objective function. This procedure can form part of a strategy for global optimization in which the greatest local maximum and least local minimum in the interior of a specified region are compared to the largest and smallest values of the objective function on the boundary of the region. The first trajectory method, a homotopy scheme, provides a globally convergent algorithm to find a stationary point of the objective function. The second trajectory method, a relaxation scheme, starts at one stationary point and systematically connects other stationary points in the specified region by a network of trjectories. It is noted that both generalized trajectory methods actually solve the stationarity conditions, and so they can also be used to find multiple roots of a set of nonlinear equations.
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- Generalized Trajectory Methods for Finding Multiple Extrema and Roots of Functions
Journal of Optimization Theory and Applications
Volume 97, Issue 1 , pp 211-227
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- trajectory tracking
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