Journal of the Operations Research Society of China ›› 2024, Vol. 12 ›› Issue (3): 809-828.doi: 10.1007/s40305-022-00432-6

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Cyclic Gradient Methods for Unconstrained Optimization

Ya Zhang, Cong Sun   

  1. School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2021-09-29 Revised:2022-06-22 Online:2024-09-30 Published:2024-08-15
  • Contact: Cong Sun, Ya Zhang E-mail:suncong86@bupt.edu.cn;zhangya0508@bupt.edu.cn
  • Supported by:
    This work is partly supported by the National Natural Science Foundation of China (Nos. 12171051 and 11871115).

Abstract: Gradient method is popular for solving large-scale problems. In this work, the cyclic gradient methods for quadratic function minimization are extended to general smooth unconstrained optimization problems. Combining with nonmonotonic line search, we prove its global convergence. Furthermore, the proposed algorithms have sublinear convergence rate for general convex functions, and R-linear convergence rate for strongly convex problems. Numerical experiments show that the proposed methods are effective compared to the state of the arts.

Key words: Gradient method, Unconstrained optimization, Nonmonotonic line search, Global convergence

CLC Number: