Skip to main content

Advertisement

Log in

Scalar and vector equilibrium problems with pairs of bifunctions

  • Published:
Journal of Global Optimization Aims and scope Submit manuscript

Abstract

In this paper, existence results for scalar and vector equilibrium problems involving two bifunctions are established. To this aim, a new concept of generalized pseudomonotonicity for a pair of bifunctions is introduced. It leads to existence criteria different from the ones encountered in the literature. The given applications refer to minimax inequalities and variational inequality problems.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Alleche, B., Rădulescu, V.: Solutions and approximate solutions of quasi-equilibrium problems in Banach spaces. J. Optim. Theory Appl. 170, 629–649 (2016)

    Article  MathSciNet  Google Scholar 

  2. Alleche, B., Rădulescu, V.: Set-valued equilibrium problems with applications to Browder variational inclusions and to fixed point theory. Nonlinear Anal. Real World Appl. 28, 251–268 (2016)

    Article  MathSciNet  Google Scholar 

  3. Aliprantis, C.D., Border, K.C.: Infinite dimensional analysis. A hitchhiker’s guide. Springer, Berlin (2006)

    MATH  Google Scholar 

  4. Ansari, Q.H., Köbis, E., Yao, J.C.: Vector variational inequalities and vector optimization. In: Jahn, J. (ed.) Theory and applications. Vector Optimization. Springer, Berlin (2018)

    MATH  Google Scholar 

  5. Balaj, M.: Stampacchia variational inequality with weak convex mappings. Optimization 67, 1571–1577 (2018)

    Article  MathSciNet  Google Scholar 

  6. Balaj, M.: Existence results for quasi-equilibrium problems under a weaker equilibrium condition. Oper. Res. Lett. 49, 333–337 (2021)

    Article  MathSciNet  Google Scholar 

  7. Barbu, V., Precupanu, T.: Convexity and optimization in banach spaces. D. Reidel, Dordrecht, The Netherlands (1986)

    MATH  Google Scholar 

  8. Berge, C.: Topological spaces. Including a treatment of multi-valued functions, vector spaces and convexity. Dover Publications, Inc., Mineola, NY (1997)

  9. Bianchi, M., Hadjisavvas, N., Schaible, S.: Vector equilibrium problems with generalized monotone bifunctions. J. Optim. Theory Appl. 92, 527–542 (1997)

    Article  MathSciNet  Google Scholar 

  10. Bianchi, M., Pini, R.: A note on equilibrium problems with properly quasimonotone bifunctions. J. Global Optim. 20, 67–76 (2001)

    Article  MathSciNet  Google Scholar 

  11. Bianchi, M., Pini, R.: Coercivity conditions for equilibrium problems. J. Optim. Theory Appl. 124, 79–92 (2005)

    Article  MathSciNet  Google Scholar 

  12. Bianchi, M., Schaible, S.: Generalized monotone bifunctions and equilibrium problems. J. Optim. Theory Appl. 90, 31–43 (1996)

    Article  MathSciNet  Google Scholar 

  13. Blum, E., Oettli, W.: From optimization and variational inequalities to equilibrium problems. Math. Student 63, 123–145 (1994)

    MathSciNet  MATH  Google Scholar 

  14. Castellani, M., Giuli, M.: On equivalent equilibrium problems. J. Optim. Theory Appl. 147, 157–168 (2010)

    Article  MathSciNet  Google Scholar 

  15. Cotrina, J., Zúñiga, J.: Quasi-equilibrium problems with non-self constraint map. J. Global Optim. 75, 177–197 (2019)

    Article  MathSciNet  Google Scholar 

  16. Cotrina, J., Svensson, A.: The finite intersection property for equilibrium problems. J. Global Optim. 79, 941–957 (2021)

    Article  MathSciNet  Google Scholar 

  17. Daniilidis, A., Hadjisavvas, N.: Existence theorems for vector variational inequalities. Bull. Austral. Math. Soc. 54, 473–481 (1996)

    Article  MathSciNet  Google Scholar 

  18. Ding, X.P., Tan, K.K.: A minimax inequality with applications to existence of equilibrium point and fixed point theorems. Colloq. Math. 63, 233–247 (1992)

    Article  MathSciNet  Google Scholar 

  19. Engelking, R.: General Topology, 2nd edn. HeldermanVerlag, Berlin (1989)

    MATH  Google Scholar 

  20. Fakhar, M., Zafarani, J.: Equilibrium problems in the quasimonotone case. J. Optim. Theory Appl. 126, 125–136 (2005)

    Article  MathSciNet  Google Scholar 

  21. Fan, K.: A generalization of Tychonoff’s fixed point theorem. Math. Ann. 142, 305–310 (1960/61)

  22. Giannessi, F.: Theorems of alternative, quadratic programs and complementarity problems. In: Variational inequalities and complementarity problems (Proc. Internat. School, Erice, 1978), pp. 151-186. Wiley, Chichester (1980)

  23. Hadjisavvas, N., Schaible, S.: From scalar to vector equilibrium problems in the quasimonotone case. J. Optim. Theory Appl. 96, 297–309 (1998)

    Article  MathSciNet  Google Scholar 

  24. Iusem, A.N., Kassay, G., Sosa, W.: An existence result for equilibrium problems with some surjectivity consequences. J. Convex Anal. 16, 807–826 (2009)

    MathSciNet  MATH  Google Scholar 

  25. Iusem, A.N., Kassay, G., Sosa, W.: On certain conditions for the existence of solutions of equilibrium problems. Math. Program. 116, 259–273 (2009)

    Article  MathSciNet  Google Scholar 

  26. Jeyakumar, V., Oettli, W., Natividad, M.: A solvability theorem for a class of quasiconvex mappings with applications to optimization. J. Math. Anal. Appl. 179, 537–546 (1993)

    Article  MathSciNet  Google Scholar 

  27. Kelley, J.L.: General topology. Van Nostrand, New York (1955)

    MATH  Google Scholar 

  28. Kneser, H.: Sur un théorème fondamental de la théorie des jeux. C. R. Acad. Sci. Paris 234, 2418–2420 (1952)

  29. Konnov, I.V., Yao, J.C.: On the generalized vector variational inequality problem. J. Math. Anal. Appl. 206, 42–58 (1997)

    Article  MathSciNet  Google Scholar 

  30. Muu, L.D., Oettli, W.: Convergence of an adaptive penalty scheme for finding constrained equilibria. Nonlinear Anal. 18, 1159–1166 (1992)

    Article  MathSciNet  Google Scholar 

  31. Nasri, M., Sosa, W.: Equilibrium problems and generalized Nash games. Optimization 60, 1161–1170 (2011)

    Article  MathSciNet  Google Scholar 

  32. Nikaidô, H.: Isoda, K: note on non-cooperative convex games. Pacific J. Math. 5, 807–815 (1955)

    Article  MathSciNet  Google Scholar 

  33. Oettli, W.: A remark on vector-valued equilibria and generalized monotonicity. Acta Math. Vietnam. 22, 213–221 (1997)

    MathSciNet  MATH  Google Scholar 

  34. Palais, R.S.: When proper maps are closed. Proc. Amer. Math. Soc. 24, 835–836 (1970)

    MathSciNet  MATH  Google Scholar 

  35. Tan, K.K., Yuan, Z.: A minimax inequality with applications to existence of equilibrium points. Bull. Austral. Math. Soc. 47, 483–503 (1993)

    Article  MathSciNet  Google Scholar 

  36. Terkelsen, F.: Some minimax theorems. Math. Scand. 31, 405–413 (1972)

    Article  MathSciNet  Google Scholar 

  37. Whyburn, G.T.: Directed families of sets and closedness of functions. Proc. Nat. Acad. Sci. U.S.A. 54, 688–692 (1965)

    Article  MathSciNet  Google Scholar 

  38. Yao, J.C.: Multi-valued variational inequalities with K-pseudomonotone operators. J. Optim. Theory Appl. 83, 391–403 (1994)

    Article  MathSciNet  Google Scholar 

  39. Yen, C.L.: A minimax inequality and its applications to variational inequalities. Pacific J. Math. 97, 477–481 (1981)

    Article  MathSciNet  Google Scholar 

  40. Zhou, J., Chen, G.: Diagonal convexity conditions for problems in convex analysis and quasi-variational inequalities. J. Math. Anal. Appl. 132, 213–225 (1988)

    Article  MathSciNet  Google Scholar 

Download references

Acknowledgements

The author would like to thank the referees for their helpful comments and suggestions.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Mircea Balaj.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Balaj, M. Scalar and vector equilibrium problems with pairs of bifunctions. J Glob Optim 84, 739–753 (2022). https://doi.org/10.1007/s10898-022-01159-7

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10898-022-01159-7

Keywords

Navigation