Abstract
In this paper, we prove an existence result for a solution to the vector equilibrium problems. Then, we establish variational principles, that is, vector optimization formulations of set-valued maps for vector equilibrium problems. A perturbation function
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Kinderlehrer, D., and Stampacchia, G., An Introduction to Variational Inequalities and Their Applications, Academic Press, New York, NY, 1980.
Giannessi, F., Theorems of the Alternative, Quadratic Programs, and Complementarity Problems, Variational Inequalities and Complementarity Problems, Edited by R. W. Cottle, F. Giannessi, and J. L. Lions, John Wiley and Sons, New York, NY, pp. 151–186, 1980.
Giannessi, F., Editor, Vector Variational Inequalities and Vector Equilibria: Mathematical Theories, Kluwer Academic Publishers, Dordrecht, Holland, 2000.
Chen, G. Y., Goh, C. J., and Yang, X. Q., On Gap Functions for Vector Variational Inequalities, Vector Variational Inequalities and Vector Equilibria: Mathematical Theories, Edited by F. Giannessi, Kluwer Academic Publishers, Dordrecht, Holland, pp. 55–72, 2000.
Ansari, Q. H., Wong, N. C., and Yao, J. C., The Existence of Nonlinear Inequalities, Applied Mathematical Letters, Vol. 12, pp. 89–92, 1999.
Antipin, A. S., On Convergence of Proximal Methods to Fixed Points of Extremal Mappings and Estimates of Their Rate of Convergence, Computational Mathematics and Mathematical Physics, Vol. 35, pp. 539–551, 1995.
Aubin, J. P., L'Analyse Non Linéaire et Ses Motivations Économiques, Masson, Paris, France, 1984.
Bianchi, M., and Schaible, S., Generalized Monotone Bifunctions and Equilibrium Problems, Journal of Optimization Theory and Applications, Vol. 90, pp. 31–43, 1996.
Blum, E., and Oettli, W., From Optimization and Variational Inequalities to Equilibrium Problems, Mathematics Student, Vol. 63, pp. 123–145, 1994.
BŔezis, H., Nirenberg, L., and Stampacchia, G., A Remark on Ky Fan's Minimax Principle, Bolletino della Unione Matematica Italiana, Vol. 6, pp. 293–300, 1972.
Chadli, O., Chbani, Z., and Riahi, H., Recession Methods for Equilibrium Problems and Applications to Variational and Hemivariational Inequalities, Discrete and Continuous Dynamical Systems, Vol. 5, pp. 185–195, 1999.
Chadli, O., Chbani, Z., and Riahi, H., Equilibrium Problems and Noncoercive Variational Inequalities, Optimization, Vol. 49, pp. 1–12, 1999.
Chadli, O., Chbani, Z., and Riahi, H., Equilibrium Problems with Generalized Monotone Bifunctions and Applications to Variational Inequalities, Journal of Optimization Theory and Applications, Vol. 105, pp. 299–323, 2000.
Hadjisavvas, N., and Schaible, S., From Scalar to Vector Equilibrium Problems in the Quasimonotone Case, Journal of Optimization Theory and Applications, Vol. 96, pp. 297–309, 1998.
Hadjisavvas, N., and Schaible, S., Quasimonotonicity and Pseudomonotonicity in Variational Inequalities and Equilibrium Problems, Generalized Convexity, Generalized Monotonicity: Recent Results, Edited by J. P. Crouzeix, J. E. Martinez-Legaz, and M. Volle, Kluwer Academic Publishers, Dordrecht, Holland, pp. 257–275, 1998.
Husain, T., and Tarafdar, E., Simultaneous Variational Inequalities, Minimization Problems, and Related Results, Mathematica Japonica, Vol. 39, pp. 221– 231, 1994.
Konnov, I. V., A Generalized Approach to Finding a Stationary Point and the Solution of Related Problems, Computational Mathematics and Mathematical Physics, Vol. 36, pp. 585–593, 1996.
Tarafdar, E., and Yuan, G. X. Z., Generalized Variational Inequalities and Their Applications, Nonlinear Analysis: Theory, Methods, and Applications, Vol. 30, pp. 4171–4181, 1997.
Yuan, G. X. Z., KKM Theory and Applications in Nonlinear Analysis, Marcel Dekker, New York, NY, 1999.
Ansari, Q. H., Vector Equilibrium Problems and Vector Variational Inequalities, Vector Variational Inequalities and Vector Equilibria: Mathematical Theories, Edited by F. Giannessi, Kluwer Academic Publishers, Dordrecht, Holland, pp. 1–15, 2000.
Ansari, Q. H., Oettli, W., and SchlÄger, D., A Generalization of Vectorial Equilibria, Mathematical Methods of Operations Research, Vol. 46, pp. 147–152, 1997.
Bianchi, M., Hadjisavvas, N., and Schaible, S., Vector Equilibrium Problems with Generalized Monotone Bifunctions, Journal of Optimization Theory and Applications, Vol. 92, pp. 527–542, 1997.
Konnov, I. V., Combined Relaxation Method for Solving Vector Equilibrium Problems, Russian Mathematics, Vol. 39, pp. 51–59, 1995.
Lee, G. M., Kim, D. S., and Lee, B. S., On Noncooperative Vector Equilibrium, Indian Journal of Pure and Applied Mathematics, Vol. 27, pp. 735–739, 1996.
Oettli, W., A Remark on Vector-Valued Equilibria and Generalized Monotonicity, Acta Mathematica Vietnamica, Vol. 22, pp. 213–221, 1997.
Oettli, W., and SchlÄger, D., Generalized Vectorial Equilibria and Generalized Monotonicity, Functional Analysis with Current Applications in Science, Technology, and Industries, Edited by M. Brokate and A. H. Siddiqi, Pitman Research Notes in Mathematics, Longman, Essex, England, Vol. 377, pp. 145–154, 1998.
Tan, N. X., and Tinh, P. N., On the Existence of Equilibrium Points of Vector Functions, Numerical Functional Analysis and Optimization, Vol. 19, pp. 141– 156, 1998.
Auchmuty, G., Variational Principles for Variational Inequalities, Numerical Functional Analysis and Optimization, Vol. 10, pp. 863–874, 1989.
Auslender, A., Optimisation: Méthodes Numériques, Masson, Paris, France, 1976.
Hearn, D. W., The Gap Function of a Convex Program, Operations Research Letters, Vol. 1, pp. 67–71, 1982.
Blum, E., and Oettli, W., Variational Principles for Equilibrium Problems, Parametric Optimization and Related Topics III, Edited by J. Guddat et al., Peter Lang, Frankfurt am Main, Germany, pp. 79–88, 1993.
Ansari, Q. H., Konnov, I. V., and Yao, J. C., Characterizations of Solutions for Vector Equilibrium Problems, Journal of Optimization Theory and Applications (to appear).
Jeykumar, V., Oettli, W., and Natividad, M., A Solvability Theorem for a Class of Quasiconvex Mappings with Applications to Optimization, Journal of Mathematical Analysis and Applications, Vol. 179, pp. 537–546, 1993.
Tanaka, T., Generalized Quasiconvexities, Cone Saddle Points, and Minimax Theorem for Vector-Valued Functions, Journal of Optimization Theory and Applications, Vol. 81, pp. 355–377, 1994.
Fan, K., A Generalization of Tichonoff's Fixed-Point Theorem, Mathematische Annalen, Vol. 142, pp. 305–310, 1961.
Chowdhury, M. S. R., and Tan, K. K., Generalized Variational Inequalities for Quasimonotone Operators and Applications, Bulletin of the Polish Academy of Sciences, Mathematics, Vol. 45, pp. 25–54, 1997.
Corley, H. W., Existence and Lagrange Duality for Maximization of Set-Valued Functions, Journal of Optimization Theory and Applications, Vol. 54, pp. 489–501, 1987.
Corley, H. W., Optimality Conditions for Maximization of Set-Valued Functions, Journal of Optimization Theory and Applications, Vol. 58, pp. 1–10, 1988.
Li, Z. F., and Chen, G. Y., Lagrangian Multipliers, Saddle Points, and Duality in Vector Optimization of Set-Valued Maps, Journal of Mathematical Analysis and Applications, Vol. 215, pp. 297–316, 1997.
Lin, L. J., Optimization of Set-Valued Functions, Journal of Mathematical Analysis and Applications, Vol. 186, pp. 30–51, 1994.
Luc, D. T., Theory of Vector Optimization, Lecture Notes in Economics and Mathematical Systems, Springer Verlag, New York, NY, Vol. 319, 1989.
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Ansari, Q.H., Konnov, I.V. & Yao, J.C. Existence of a Solution and Variational Principles for Vector Equilibrium Problems. Journal of Optimization Theory and Applications 110, 481–492 (2001). https://doi.org/10.1023/A:1017581009670
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DOI: https://doi.org/10.1023/A:1017581009670