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Weak Sharpness and Finite Convergence for Solutions of Nonsmooth Variational Inequalities in Hilbert Spaces

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This paper deals with the study of weak sharp solutions for nonsmooth variational inequalities and finite convergence property of the proximal point method. We present several characterizations for weak sharpness of the solutions set of nonsmooth variational inequalities without using the gap functions. We show that under weak sharpness of the solutions set, the sequence generated by proximal point methods terminates after a finite number of iterations. We also give an upper bound for the number of iterations for which the sequence generated by the exact proximal point methods terminates.

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Acknowledgements

This article was supported by the National Natural Science Foundation of China under Grant No.11401152. The first author was also supported by the Research Fund for International Young Scientists under Grant No. 1181101157 and the China Postdoctoral Science Foundation under Grant No. 2017M620042. The main part of this paper was done when the first author was a postdoc at UESTC, China.

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Correspondence to Xiaolong Qin.

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Nguyen, L.V., Ansari, Q.H. & Qin, X. Weak Sharpness and Finite Convergence for Solutions of Nonsmooth Variational Inequalities in Hilbert Spaces. Appl Math Optim 84, 807–828 (2021). https://doi.org/10.1007/s00245-020-09662-7

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