... distribution, and reproduction in any medium, provided the original work is properly cited.1. IntroductionThe study of equilibriumproblems has recently been a rapidly growing area of research. See, for ... constraints,” Journal of Inequalities and Applications, vol. 2008, Article ID 657329, 14 pages,2008.4 J P. Aubin and I. Ekeland, Applied Nonlinear Analysis, John Wiley & Sons, New York, NY, USA, ... Springer, New York,NY, USA, 2006.7 A. D. Ioffe and A. J. Zaslavski, Variational principles and well-posedness in optimization and calculus of variations,” SIAM Journal on Control and Optimization,...