Acta mathematica scientia,Series A ›› 2011, Vol. 31 ›› Issue (4): 866-879.

• Articles • Previous Articles     Next Articles

A Bundle Proximal Method for Solving General Mixed Variational Inequalities

 XIA Fu-Quan1, HUANG Na-Jing2   

  1. 1.College of Mathematics and Software Science, Sichuan Normal University, Chengdu |610066;
    2.Department of Mathematics, Sichuan University, Chengdu 610064
  • Received:2009-09-21 Revised:2010-10-30 Online:2011-08-25 Published:2011-08-25
  • Supported by:

    国家自然科学基金(10671135, 70831005)、四川省教育厅重点项目(09ZA091)、四川省应用基础项目(2010JY0121)和教育部博士点基金
     (20105134120002)资助

Abstract:

In this paper, the authors consider a bundle proximal method for solving general mixed variational inequalities. The method is based on the auxiliary problem principle due to Cohen and the bundle Bregman proximal method for convex nonsmooth optimization due to Kiwiel. The strategy is to approximate, in the subproblems, the nonsmooth convex function f by a sequence of linear convex piecewise functions fk, which is constructed from accumulated subgradient linearizations of f. As in the bundle Bregman proximal method for nonsmooth optimization, the  method generates a sequence {xk} by taking xk to be an approximate minimizer of subproblems. This makes the subproblems more tractable. The authors first explain how to build a new iterative scheme and a stopping criterion to determine whether the current approximation is good enough. This criterion is different from that commonly used in the special case of nonsmooth optimization. The authors also prove that the convergence of the algorithm for the case that the mapping T satisfies  the pseudo-Dunn property.

Key words: Iterative schemes, Proximal methods, Bundle methods, Strongly convex function, Pseudo-Dunn property

CLC Number: 

  • 90C25
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