Two descent hybrid conjugate gradient methods for optimization

  • Authors:
  • Li Zhang;Weijun Zhou

  • Affiliations:
  • College of Mathematics and Computational Science, Changsha University of Science and Technology, Changsha 410076, China;College of Mathematics and Computational Science, Changsha University of Science and Technology, Changsha 410076, China

  • Venue:
  • Journal of Computational and Applied Mathematics
  • Year:
  • 2008

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Abstract

In this paper, we propose two new hybrid nonlinear conjugate gradient methods, which produce sufficient descent search direction at every iteration. This property depends neither on the line search used nor on the convexity of the objective function. Under suitable conditions, we prove that the proposed methods converge globally for general nonconvex functions. The numerical results show that both hybrid methods are efficient for the given test problems from the CUTE library.