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The Nelder-Mead simplex method for function minimization is a "direct" method requiring no derivatives. The objective function is evaluated at the vertices of a simplex, and movement is away from the ...
Douglass J. Wilde, Andreas Acrivos, Minimization of a Piecewise Quadratic Function Arising in Production Scheduling, Operations Research, Vol. 8, No. 5 (Sep. - Oct ...