Flow Search Approach and New Bounds for the m-Step Linear Conjugate Gradient Algorithm
H. X. Huang,
Z. A. Liang and
P. M. Pardalos
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H. X. Huang: Tsinghua University
Z. A. Liang: Shanghai University of Finance and Economics
P. M. Pardalos: University of Florida
Journal of Optimization Theory and Applications, 2004, vol. 120, issue 1, No 3, 53-71
Abstract:
Abstract A flow search approach is presented in this paper. In the approach, each iterative process involves a subproblem, whose variables are the stepsize parameters. Every feasible solution of the subproblem corresponds to some serial search stages, the stepsize parameters in different search stages may interact mutually, and their optimal values are determined by evaluating the total effect of the interaction. The main idea of the flow search approach is illustrated via the minimization of a convex quadratic function. Based on the flow search approach, some properties of the m-step linear conjugate gradient algorithm are analyzed and new bounds on its convergence rate are also presented. Theoretical and numerical results indicate that the new bounds are better than the well-known ones.
Keywords: Flow search approach; conjugate gradient algorithm; m-step linear conjugate gradient algorithm; convergence rate (search for similar items in EconPapers)
Date: 2004
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DOI: 10.1023/B:JOTA.0000012732.62633.59
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