Journal
OPTIMIZATION METHODS & SOFTWARE
Volume 30, Issue 6, Pages 1146-1163Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10556788.2015.1025402
Keywords
equilibrium problems; pseudo-monotone bifunctions; proximal point algorithm; weak convergence; strong convergence; Halpern method
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In this paper, we study the weak and strong convergence of the proximal point algorithm for equilibrium problems of pseudo-monotone type in Hilbert spaces. We prove the weak convergence of the generated sequence to a common solution of two equilibrium problems and some strong convergence results with additional assumptions on pseudo-monotone bifunctions. Then we study a regularization of Halpern-type and prove the strong convergence of the generated sequence to an equilibrium point of two pseudo-monotone bifunctions without any additional assumption on bifunctions. Finally, some examples of pseudo-monotone bifunctions from pseudo-monotone operators and Nash-Cournot oligopolistic equilibrium models are also presented. Our results extend some similar results in the literature for monotone and pseudo-monotone equilibrium problems and also the related results for variational inequalities associated with monotone and pseudo-monotone operators.
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