Abstract
In this paper, we deal with the Tikhonov regularization method for pseudo-monotone equilibrium problems. Under mild conditions of semicontinuity and convexity, we show that strictly pseudo-monotone bifunctions can be also used as regularization bifunctions as well as strongly monotone bifunctions. We extend Berge’s maximum theorem and establish the relationship between quasi-hemivariational inequalities and equilibrium problems. Applications of the Tikhonov regularization method to quasi-hemivariational inequalities are also given.
Similar content being viewed by others
References
Alleche, B.: Multivalued mixed variational inequalities with locally Lipschitzian and locally cocoercive multivalued mappings. J. Math. Anal. Appl. 399, 625–637 (2013)
Alleche, B.: On hemicontinuity of bifunctions for solving equilibrium problems. Adv. Nonlinear Anal. 3(2), 69–80 (2014)
Alleche, B., Calbrix, J.: On the coincidence of the upper Kuratowski topology with the cocompact topology. Topol. Appl. 93, 207–218 (1999)
Alleche, B., Rădulescu, V.D.: Equilibrium problem techniques in the qualitative analysis of quasi-hemivariational inequalities. Optimization (2014). doi:10.1080/02331934.2014.917307
Ansari, Q.H., Lalitha, C.S., Mehta, M.: Generalized Convexity, Nonsmooth Variational Inequalities and Nonsmooth Optimization. CRC Press, Taylor & Francis Group (2014)
Avriel, M., Diewert, W.E., Schaible, S., Zang, I.: Generalized Concavity. Plenum Press, New York (1988)
Bianchi, M., Schaible, S.: Generalized monotone bifunctions and equilibrium problems. J. Optim. Theory Appl. 90(1), 31–43 (1996)
Bianchi, M., Schaible, S.: Equilibrium problems under generalized convexity and generalized monotonicity. J. Glob. Optim. 30, 121–134 (2004)
Blum, E., Oettli, W.: From optimization and variational inequalities to equilibrium problems. Math. Stud. 63, 123–145 (1994)
Cambini, A., Martein, L.: Generalized convexity and optimization. Theory and applications, vol. 616. Lecture Notes in Economics and Mathematical Systems. Springer, Berlin (2009)
Clarke, F.H.: Optimization and nonsmooth analysis. In: Society for Industrial and Applied Mathematics, Philadelphia, sIAM Edition (1990)
Costea, C., Rădulescu, V.: Inequality problems of quasi-hemivariational type involving set-valued operators and a nonlinear term. J. Glob. Optim. 52, 743–756 (2012)
Ding, X.P.: Auxiliary principle and algorithm for mixed equilibrium problems and bilevel mixed equilibrium problems in Banach spaces. J. Optim. Theory Appl 146(2), 347–357 (2010)
Dinh, B.V., Muu, L.D.: On penalty and gap function methods for bilevel equilibrium problems. J. Appl. Math. 2011, 1–14 (2011)
Fan, K.: A generalization of Tychonoff’s fixed point theorem. Math. Ann. 142, 305–310 (1961)
Fan, K.: A minimax inequality and its application. In: Shisha, O. (ed.) Inequalities, vol. 3, pp. 103–113. Academic, New York (1972)
Hadjisavvas, N., Schaible, S.: On strong pseudomonotonicity and (semi)strict quasimonotonicity. J. Optim. Theory Appl. 79, 139–155 (1993)
Hadjisavvas, N., Schaible, S.: Generalized monotonicity: applications to variational inequalities and equilibrium problems. In: Floudas, C.A., Pardalos, P.M. (eds.) Encyclopedia of Optimization, pp. 1202–1209. Springer, US (2009)
Hung, P.G., Muu, L.D.: The Tikhonov regularization extended to equilibrium problems involving pseudomonotone bifunctions. Nonlinear Anal. 74(17), 6121–6129 (2011)
Kassay, G.: On equilibrium problems. In: Chinchuluun, A., Pardalos, P.M., Enkhbat, R., Tseveendorj, I. (eds.) Optimization and Optimal Control: Theory and Applications, vol. 39. Optimization and its Applications. Springer, Berlin, pp. 55–83 (2010)
Kinderlehrer, D., Stampacchia, G.: An Introduction to Variational Inequalities. Academic Press, New York (1980)
Konnov, I.: Combined Relaxation Methods for Variational Inequalities. Springer, Berlin (2001)
Konnov, I.V., Schaible, S.: Duality for equilibrium problems under generalized monotonicity. J. Optim. Theory Appl. 104, 395–408 (2000)
Lions, J.-L., Stampacchia, G.: Variational inequalities. Comm. Pure Appl. Math. 20, 493–519 (1967)
Mastroeni, G.: Gap functions for equilibrium problems. J. Glob. Optim. 27(4), 411–426 (2003)
Moudafi, A.: Proximal methods for a class of bilevel monotone equilibrium problems. J. Glob. Optim. 47, 287–292 (2010)
Muu, L.D., Oettli, W.: Convergence of an adaptive penalty scheme for finding constrained equilibria. Nonlinear Anal. TMA 18(12), 1159–1166 (1992)
Naniewicz, Z., Panagiotopoulos, P.D.: Mathematical Theory of Hemivariational Inequalities and Applications. Marcel Dekker, New York (1995)
Panagiotopoulos, P.D.: Nonconvex energy functions. Hemivariational inequalities and substationarity principles. Acta. Mech. 42, 160–183 (1983)
Panagiotopoulos, P.D.: Inequality Problems in Mechanics and Applications: Convex and Nonconvex Energy Functions. Birkhäuser, Boston (1985)
Papageorgiou, N.S., Kyritsi-Yiallourou, S.T.H.: Handbook of applied analysis. In: Advances in Mechanics and Mathematics, vol. 19. Springer, Dordrecht (2009)
Rockafellar, R.T.: Convex Analysis. Princeton University Press, New Jersey (1970)
Rădulescu, V.: Qualitative analysis of nonlinear elliptic partial differential equations. In: Contemporary Mathematics and its Applications, vol. 6. Hindawi Publ Corporation, New York (2008)
Tikhonov, A.N.: Solution of incorrectly formulated problems and the regularization method. Doklady Akademii Nauk SSSR 151, 501–504 (1963)
Wangkeeree, R., Preechasilp, P.: Existence theorems of the hemivariational inequality governed by a multi-valued map perturbed with a nonlinear term in Banach spaces. J. Glob. Optim. 57, 1447–1464 (2013)
Acknowledgments
The authors thank the anonymous referees for the careful reading of this paper and for their useful remarks concerning Theorem 3.1.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Alleche, B., Rădulescu, V.D. & Sebaoui, M. The Tikhonov regularization for equilibrium problems and applications to quasi-hemivariational inequalities. Optim Lett 9, 483–503 (2015). https://doi.org/10.1007/s11590-014-0765-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11590-014-0765-3