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Appendix A. Keyword Reference |  |
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Appendix A. Keyword Reference | |
FLETCHER — Use Fletcher-Reeves version of conjugate gradient.
FLETCHER
The congugate gradient (CG) method is use for solving certains types of equations and comes in to main flavors: Polack-Ribiere and Fletcher-Reeves. These differ only with regard to a single updated parameter. AMPAC uses the Polack-Ribiere version by default but FLETCHER will turn on the Fletcher-Reevers instead.
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