Abstract
Conjugate gradient methods are very important ones for solving nonlinear optimization problems, especially for large scale problems. However, unlike quasi-Newton methods, conjugate gradient methods were usually analyzed individually. In this paper, we propose a class of conjugate gradient methods, which can be regarded as some kind of convex combination of the Fletcher-Reeves method and the method proposed by Dai et al. To analyze this class of methods, we introduce some unified tools that concern a general method with the scalar βk having the form of φk/ φ k−1.Consequently, the class of conjugate gradient methods can uniformly be analyzed.
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Dai, Y., Yuan, Y. A class of globally convergent conjugate gradient methods. Sci. China Ser. A-Math. 46, 251–261 (2003). https://doi.org/10.1360/03ys9027
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DOI: https://doi.org/10.1360/03ys9027