Abstract
This paper studies an algorithm for minimizing a convex function based upon a combination of polyhedral and quadratic approximation. The method was given earlier, but without a good specification for updating the algorithm's curvature matrix. Here, for the case of onedimensional minimization, we provide a specification that insures convergence even in cases where the curvature scalar tends to zero or infinity. Under mild additional assumptions, we show that the convergence is superlinear.
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Lemarechal, C., Mifflin, R. Global and superlinear convergence of an algorithm for one-dimensional minimization of convex functions. Mathematical Programming 24, 241–256 (1982). https://doi.org/10.1007/BF01585109
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DOI: https://doi.org/10.1007/BF01585109