Abstract
We propose a relaxed-inertial proximal point algorithm for solving equilibrium problems involving bifunctions which satisfy in the second variable a generalized convexity notion called strong quasiconvexity, introduced by Polyak (Sov Math Dokl 7:72–75, 1966). The method is suitable for solving mixed variational inequalities and inverse mixed variational inequalities involving strongly quasiconvex functions, as these can be written as special cases of equilibrium problems. Numerical experiments where the performance of the proposed algorithm outperforms one of the standard proximal point methods are provided, too.
Similar content being viewed by others
Data Availability
No data sets were generated during the current study. The used matlab codes are available from all authors on reasonable request.
References
Addi, K., Adly, S., Goeleven, G., Saoud, H.: A sensitivity analysis of a class of semi-coercive variational inequalities using recession tools. J. Glob. Optim. 40, 7–27 (2008)
Alvarez, F.: Weak convergence of a relaxed and inertial hybrid projection-proximal point algorithm for maximal monotone operators in Hilbert space. SIAM J. Optim. 14, 773–782 (2003)
Alvarez, F., Attouch, H.: An inertial proximal method for maximal monotone operators via discretization of a nonlinear oscillator with damping. Set-Valued Var. Anal. 9, 3–11 (2001)
Ansari, Q.H., Babu, F., Raju, M.S.: Proximal point method with Bregman distance for quasiconvex pseudomonotone equilibrium problems. Optimization (2023). https://doi.org/10.1080/02331934.2023.2252430
Bauschke, H.H. , Combettes, P.L.: Convex Analysis and Monotone Operators Theory in Hilbert Spaces. CMS Books in Mathematics, 2nd edn. Springer, Berlin (2017)
Blum, E., Oettli, W.: From optimization and variational inequalities to equilibrium problems. Math. Stud. 63, 123–145 (1994)
Boţ, R.I., Csetnek, E.R.: Proximal-gradient algorithms for fractional programming. Optimization 66, 1383–1396 (2017)
Brauer, A.: Limits for the characteristic roots of matrices IV: applications to stochastic matrices. Duke Math. J. 19, 75–91 (1952)
Bredies, K., Lorenz, D.: Iterated hard shrinkage for minimization problems with sparsity constraints. SIAM J. Sci. Comput. 30, 657–683 (2008)
Cambini, A., Martein, L.: Generalized Convexity and Optimization: Theory and Applications. Springer, Berlin (2009)
Cherukuri, A., Gharesifard, B., Cortés, J.: Saddle-point dynamics: conditions for asymptotic stability of saddle points. SIAM J. Control Optim. 55, 486–511 (2017)
Facchinei, F., Pang, J.-S.: Finite-Dimensional Variational Inequalities and Complementarity Problems, vol. I. Springer, New York (2003)
Facchinei, F., Pang, J.-S.: Finite-Dimensional Variational Inequalities and Complementarity Problems, vol. II. Springer, New York (2003)
Goeleven, D.: Complementarity and Variational Inequalities in Electronics. Academic Press, London (2017)
Goudou, X., Munier, J.: The gradient and heavy ball with friction dynamical systems: the quasiconvex case. Math. Program. 116, 173–191 (2007)
Grad, S.-M., Lara, F.: Solving mixed variational inequalities beyond convexity. J. Optim. Theory Appl. 190, 565–580 (2021)
Grad, S.-M., Lara, F., Marcavillaca, R.T.: Relaxed-inertial proximal point type algorithms for quasiconvex minimization. J. Glob. Optim. 85, 615–635 (2023)
Hadjisavvas, N.: Convexity, generalized convexity and applications. In: Al-Mezel, S., et al. (Eds.) Fixed Point Theory, Variational Analysis and Optimization, pp. 139–169. Taylor & Francis, Boca Raton (2014)
Hadjisavvas, N., Komlosi, S., Schaible, S.: Handbook of Generalized Convexity and Generalized Monotonicity. Springer, Boston (2005)
He, B.: Algorithm for a class of generalized linear variational inequality and its application. Sci. China A 25, 939–945 (1995)
He, B., He, X.-Z., Liu, H.K.: Solving a class of constrained black-box inverse variational inequalities. Eur. J. Oper. Res. 204, 391–401 (2010)
Hieu, D.: An inertial-like proximal algorithm for equilibrium problems. Math. Methods Oper. Res. 88, 399–415 (2018)
Hieu, D., Duong, H.N., Thai, B.H.: Convergence of relaxed inertial methods for equilibrium problems. J. Appl. Numer. Optim. 3, 215–229 (2021)
Iusem, A., Lara, F.: Optimality conditions for vector equilibrium problems with applications. J. Optim. Theory Appl. 180, 187–206 (2019)
Iusem, A., Lara, F.: Existence results for noncoercive mixed variational inequalities in finite dimensional spaces. J. Optim. Theory Appl. 183, 122–138 (2019)
Iusem, A., Lara, F.: A note on existence results for noncoercive mixed variational inequalities in finite dimensional spaces. J. Optim. Theory Appl. 187, 607–608 (2020)
Iusem, A., Lara, F.: Proximal point algorithms for quasiconvex pseudomonotone equilibrium problems. J. Optim. Theory Appl. 193, 443–461 (2022)
Iusem, A., Lara, F., Marcavillaca , R.T., Yen, L.H. : A two-step PPA for nonconvex equilibrium problems with applications to fractional programming (submitted)(2023)
Jovanović, M.: A note on strongly convex and quasiconvex functions. Math. Notes 60, 584–585 (1996)
Kassay, G., Rădulescu, V.: Equilibrium Problems and Applications. Elsevier, Amsterdam (2018)
Koumatos, K., Spirito, S.: Quasiconvex elastodynamics: weak–strong uniqueness for measure-valued solutions. Commun. Pure Appl. Math. 72, 1288–1320 (2019)
Lara, F.: On strongly quasiconvex functions: existence results and proximal point algorithms. J. Optim. Theory Appl. 192, 891–911 (2022)
Lara, F.: On nonconvex pseudomonotone equilibrium problems with applications. Set-Valued Var. Anal. 30, 355–372 (2022)
Maingué, M.: Asymptotic convergence of an inertial proximal method for unconstrained quasiconvex minimization. J. Glob. Optim. 45, 631–644 (2009)
Malitsky, Y.: Golden ratio algorithms for variational inequalities. Math. Program. 184, 383–410 (2020)
Moudafi, A.: Second-order differential proximal methods for equilibrium problems. J. Inequal. Pure Appl. Math. 4, Art. 18 (2003)
Ovcharova, N., Gwinner, J.: Semicoercive variational inequalities: from existence to numerical solutions of nonmonotone contact problems. J. Optim. Theory Appl. 171, 422–439 (2016)
Polyak, B.T.: Existence theorems and convergence of minimizing sequences in extremum problems with restrictions. Sov. Math. Dokl. 7, 72–75 (1966) (translation from Dokl Akad Nauk SSSR, 166, 287–290 (1966))
Polyak, B.T.: Some methods of speeding up the convergence of iteration methods. U.S.S.R. Comput. Math. Math. Phys. 4, 1–17 (1967) (translation from Zh. Vychisl. Mat. Mat. Fiz., 4, 791–803 (1964))
Quoc, T.D., Muu, L.D., Hien, N.V.: Extragradient algorithms extended to equilibrium problems. Optimization 57, 749–766 (2008)
Rockafellar, R.T., Wets, R.: Generalized linear-quadratic problems of deterministic and stochastic optimal control in discrete time. SIAM J. Control Optim. 28, 810–820 (1990)
Rouhani, B.D. , Piranfar, M.R.: Asymptotic behavior for a quasi-autonomous gradient system of expansive type governed by a quasiconvex function. Electron. J. Differ. Equ. 2021, paper no. 15 (2021)
Schaible, S.: Fractional programming. In: Horst, R., Pardalos, P. (eds.) Handbook of Global Optimization, pp. 495–608. Kluwer, Dordrecht (1995)
Schaible, S., Ziemba, W.T.: Generalized Concavity in Optimization and Economics. Academic Press, New York (1981)
Stancu-Minasian, I.M.: Fractional Programming: Theory, Methods and Applications. Kluwer, Dordrecht (1997)
S̆tuller., J.: Ordered modified Gram–Schmidt orthogonalization revised. J. Comput. Appl. Math. 63, 221–227 (1995)
Van Vinh, L., Tran, V.N., Vuong, P.T.: A second-order dynamical system for equilibrium problems. Numer. Algorithms 91, 327–351 (2022)
Verkhovsky, B.S.: Information protection based on extraction of square roots of gaussian integers. Int. J. Commun. Netw. Syst. Sci. 4, 133–138 (2011)
Vial, J.P.: Strong convexity of sets and functions. J. Math. Econ. 9, 187–205 (1982)
Wang, M.: The existence results and Tikhonov regularization method for generalized mixed variational inequalities in Banach spaces. Ann. Math. Phys. 7, 151–163 (2017)
Yen, L.H., Muu, L.D.: A parallel subgradient projection algorithm for quasiconvex equilibrium problems under the intersection of convex sets. Optimization 71, 4447–4462 (2022)
Yen, L.H., Muu, L.D.: An extragradient algorithm for quasiconvex equilibrium problems without monotonicity. J. Glob. Optim. (2023). https://doi.org/10.1007/s10898-023-01291-y
Zhao, Y.-B.: The iterative methods for monotone generalized variational inequalities. Optimization 42, 285–307 (1997)
Funding
The authors would like to thank the MATH AmSud cooperation program (Project AMSUD-220020) for its support. This research was partially supported by Anid–Chile under project Fondecyt Regular 1220379 (Lara), and by a CIAS Senior Research Fellow Grant of the Corvinus Institute for Advanced Studies, by the Hi! PARIS Center and by a public grant from the Fondation Mathématique Jacques Hadamard as part of the Investissement d’avenir project, reference ANR-11-LABX-0056-LMH, LabEx LMH (Grad).
Author information
Authors and Affiliations
Contributions
All authors contributed equally to the study conception, design and implementation and wrote and corrected the manuscript.
Corresponding author
Ethics declarations
Conflict of interest
There are no conflicts of interest or competing interests related to this paper.
Additional information
Communicated by Alexander Vladimirovich Gasnikov.
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
In loving memory of Boris Teodorovich Polyak.
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Grad, SM., Lara, F. & Tintaya Marcavillaca, R. Relaxed-Inertial Proximal Point Algorithms for Nonconvex Equilibrium Problems with Applications. J Optim Theory Appl (2024). https://doi.org/10.1007/s10957-023-02375-1
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s10957-023-02375-1