Existence and iteration for a mixed equilibrium problem and a countable family of nonexpansive mappings in Banach spaces

Authors:
Prasit Cholamjiak;Suthep Suantai
Affiliations:
Department of Mathematics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;Department of Mathematics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand and Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, ...
Venue:
Computers & Mathematics with Applications
Year:
2011

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Abstract

We prove the existence of a solution of the mixed equilibrium problem (MEP) by using the KKM mapping in a Banach space setting. Then, by virtue of this result, we construct a hybrid algorithm for finding a common element in the solutions set of a mixed equilibrium problem and the fixed points set of a countable family of nonexpansive mappings in the frameworks of Banach spaces. By using a projection technique, we also prove that the sequences generated by the hybrid algorithm converge strongly to a common element in the solutions set of MEP and common fixed points set of nonexpansive mappings. Moreover, some applications concerning the equilibrium and the convex minimization problems are obtained.