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On the convergence of derivative-free methods for unconstrained optimization

Bibliographic reference Conn, Andy ; Scheinberg, Katya ; Toint, Philippe ; Iserles, A ; Buhmann, M. On the convergence of derivative-free methods for unconstrained optimization. In: Approximation Theory and Optimization: Tributes to M. J. D. Powell : , Cambridge University Press  : Cambridge, UK 1997, p. 83-108
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