Abstract
In this paper, we consider nonsmooth vector variational-like inequalities and nonsmooth vector optimization problems. By using the scalarization method, we define nonsmooth variational-like inequalities by means of Clarke generalized directional derivative and study their relations with the vector optimizations and the scalarized optimization problems. Some existence results for solutions of our nonsmooth variational-like inequalities are presented under densely pseudomonotonicity or pseudomonotonicity assumption.
Similar content being viewed by others

References
Al-Homidan, S., Ansari, Q.H.: Generalized Minty vector variational-like inequalities and vector optimization problems. J. Optim. Theory Appl. 144, 1–11 (2010)
Al-Homidan, S., Ansari, Q.H., Yao, J.-C.: Nonsmooth invexities, invariant monotonicities and nonsmooth vector variational-like inequalities with applications to vector optimization. In: Recent Advances in Vector Optimization, 221–274. Springer, Berlin (2012)
Ansari, Q.H., Lee, G.M.: Non-smooth vector optimization problems and Minty vector variational inequalities. J. Optim. Theory Appl. 145, 1–16 (2010)
Ansari, Q.H., Rezaei, M., Zafarani, J.: Generalized vector variational-like inequalities and vector optimization. J. Global Optim. 53, 271–284 (2012)
Ansari, Q.H., Yao, J.C.: A fixed point theorem and its applications to the system of variational inequalities. Bull. Austral. Math. Soc. 59, 433–442 (1999)
Ansari, Q.H., Yao, J.C.: On nondifferentiable and nonconvex vector optimization problems. J. Optim. Theory Appl. 106, 487–500 (2000)
Ansari, Q.H., Yao, J.-C.: Recent Advances in Vector Optimization. Springer, Berlin (2012)
Auslender, A., Teboulle, M.: Asymptotic Cones and Functions in Optimization and Variational Inequalities. Springer, New York (2003)
Crespi, G.P., Ginchev, I., Rocca, M.: Some remarks on the Minty vector variational principle. J. Math. Anal. Appl. 345, 165–175 (2008)
Fan, K.: A generalization of Tychonoff’s fixed point theorem. Math. Ann. 142, 305–310 (1961)
Gang, X., Liu, S.: On Minty vector variational-like inequality. Comput. Math. Appl. 56, 311–323 (2008)
Giannessi, F. (ed.): Vector Variational Inequalities and Vector Equilibria. Mathematical Theories. Kluwer Academic Publishers, Dordrecht (2000)
Guu, S.-M., Li, J.: Vector variational-like inequalities with generalized bifunctions defined on nonconvex sets. Nonlinear Anal. 71, 2847–2855 (2009)
Lalitha, C.S., Mehta, M.: Vector variational inequalities with cone-pseudomonotone bifunctions. Optimization 54, 327–338 (2005)
Luc, D.T.: Existence results for densely pseudomonotone variational inequalities. J. Math. Anal. Appl. 254, 291–308 (2001)
Mishra, S.K., Wang, S.Y.: Vector variational-like inequalities and non-smooth vector optimization problems. Nonlinear Anal. 64, 1939–1945 (2006)
Rezaie, M., Zafarani, J.: Vector optimization and variational-like inequalities. J. Global Optim. 43, 47–66 (2009)
Ruiz-Garzón, G., Osuna-Gómez, R., Rufián-Lizana, A.: Relationships between vector variational-like inequality and optimization problems. Eur. J. Oper. Res. 157, 113–119 (2004)
Santos, L.B., Rojas-Medar, M., Ruiz-Garzón, G., Rufián-Lizana, A.: Existence of weakly efficient solutions in nonsmooth vector optimization. Appl. Math. Comput. 200, 547–556 (2008)
Yang, X.M., Yang, X.Q.: Vector variational-like inequality with pseudoinvexity. Optimization 55, 157–170 (2006)
Acknowledgments
This research was done during the stay of second author at King Fahd University of Petroleum & Minerals, Dhahran Saudi Arabia. It was supported by a KFUPM funded project No. IN 101009.
Author information
Authors and Affiliations
Corresponding author
Additional information
Authors are grateful to the King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia for providing excellent research facilities to carry out this research.
Rights and permissions
About this article
Cite this article
Alshahrani, M., Ansari, Q.H. & Al-Homidan, S. Nonsmooth variational-like inequalities and nonsmooth vector optimization. Optim Lett 8, 739–751 (2014). https://doi.org/10.1007/s11590-013-0614-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11590-013-0614-9