On Gap Functions for Quasi-Variational Inequalities

For variational inequalities, various merit functions, such as the gap function, the regularized gap function, the D-gap function and so on, have been proposed. These functions lead to equivalent optimization formulations and are used to optimization-based methods for solving variational inequalitie...

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Main Author: Kouichi Taji
Format: Article
Language:English
Published: Wiley 2008-01-01
Series:Abstract and Applied Analysis
Online Access:http://dx.doi.org/10.1155/2008/531361
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author Kouichi Taji
author_facet Kouichi Taji
author_sort Kouichi Taji
collection DOAJ
description For variational inequalities, various merit functions, such as the gap function, the regularized gap function, the D-gap function and so on, have been proposed. These functions lead to equivalent optimization formulations and are used to optimization-based methods for solving variational inequalities. In this paper, we extend the regularized gap function and the D-gap functions for a quasi-variational inequality, which is a generalization of the variational inequality and is used to formulate generalized equilibrium problems. These extensions are shown to formulate equivalent optimization problems for quasi-variational inequalities and are shown to be continuous and directionally differentiable.
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spelling doaj-art-30f9ec1ca9bf466183fb8292d381a9e12025-08-20T02:38:54ZengWileyAbstract and Applied Analysis1085-33751687-04092008-01-01200810.1155/2008/531361531361On Gap Functions for Quasi-Variational InequalitiesKouichi Taji0Department of Mechanical Science and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, JapanFor variational inequalities, various merit functions, such as the gap function, the regularized gap function, the D-gap function and so on, have been proposed. These functions lead to equivalent optimization formulations and are used to optimization-based methods for solving variational inequalities. In this paper, we extend the regularized gap function and the D-gap functions for a quasi-variational inequality, which is a generalization of the variational inequality and is used to formulate generalized equilibrium problems. These extensions are shown to formulate equivalent optimization problems for quasi-variational inequalities and are shown to be continuous and directionally differentiable.http://dx.doi.org/10.1155/2008/531361
spellingShingle Kouichi Taji
On Gap Functions for Quasi-Variational Inequalities
Abstract and Applied Analysis
title On Gap Functions for Quasi-Variational Inequalities
title_full On Gap Functions for Quasi-Variational Inequalities
title_fullStr On Gap Functions for Quasi-Variational Inequalities
title_full_unstemmed On Gap Functions for Quasi-Variational Inequalities
title_short On Gap Functions for Quasi-Variational Inequalities
title_sort on gap functions for quasi variational inequalities
url http://dx.doi.org/10.1155/2008/531361
work_keys_str_mv AT kouichitaji ongapfunctionsforquasivariationalinequalities