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International Journal of Mathematics and Mathematical Sciences
Volume 2005 (2005), Issue 11, Pages 1723-1735

Characterizations of fixed points of nonexpansive mappings

Department of Mathematics, Kyushu Institute of Technology, Sensui-cho, Tobata-ku, Kitakyushu 804-8550, Japan

Received 14 September 2004; Revised 24 March 2005

Copyright © 2005 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Using the notion of Banach limits, we discuss the characterization of fixed points of nonexpansive mappings in Banach spaces. Indeed, we prove that the two sets of fixed points of a nonexpansive mapping and some mapping generated by a Banach limit coincide. In our discussion, we may not assume the strict convexity of the Banach space.