Journal of the Operations Research Society of China ›› 2021, Vol. 9 ›› Issue (1): 195-206.doi: 10.1007/s40305-018-0235-1

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Generalized Krasnoselskii–Mann-Type Iteration for Nonexpansive Mappings in Banach Spaces

You-Cai Zhang, Ke Guo, Tao Wang   

  1. School of Mathematics and Information, China West Normal University, Nanchong 637002, Sichuan, China
  • Received:2018-03-25 Revised:2018-06-14 Online:2021-03-11 Published:2021-03-11
  • Contact: Ke Guo, You-Cai Zhang, Tao Wang E-mail:keguo2014@126.com;925094535@qq.com;632539795@qq.com
  • Supported by:
    You-Cai Zhang was supported by the Students Innovation and Entrepreneurship Training Program Foundation of China West Normal University (No. 201810638047). Ke Guo was supported by the National Natural Science Foundation of China (Nos. 11571178 and 11801455), Fundamental Research Funds of China West Normal University (Nos. 17E084 and 18B031).

Abstract: The Krasnoselskii-Mann iteration plays an important role in the approximation of fixed points of nonexpansive mappings, and it is well known that the classic Krasnoselskii-Mann iteration is weakly convergent in Hilbert spaces. The weak convergence is also known even in Banach spaces. Recently, Kanzow and Shehu proposed a generalized Krasnoselskii-Mann-type iteration for nonexpansive mappings and established its convergence in Hilbert spaces. In this paper, we show that the generalized Krasnoselskii-Mann-type iteration proposed by Kanzow and Shehu also converges in Banach spaces. As applications, we proved the weak convergence of generalized proximal point algorithm in the uniformly convex Banach spaces.

Key words: Krasnoselskii-Mann-type iteration, Nonexpansive mappings, Weak convergence, Accretive operator, proximal point algorithm, Banach spaces

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