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- research-articleDecember 2024
Reformulations for Projected Solutions of Generalized Games
Journal of Optimization Theory and Applications (JOPT), Volume 204, Issue 1https://doi.org/10.1007/s10957-024-02591-3AbstractWe show that projected solutions of a generalized game correspond to classical ones of an auxiliary generalized game obtained by doubling the number of players. Based on this reformulation and using known results for the existence of classical ...
- research-articleSeptember 2022
A Modified Michael’s Selection Theorem with Application to Generalized Nash Equilibrium Problem
Journal of Optimization Theory and Applications (JOPT), Volume 196, Issue 1Pages 199–211https://doi.org/10.1007/s10957-022-02090-3AbstractThis paper provides a sufficient condition for the existence of solutions for generalized Nash equilibrium problems in the infinite-dimensional setting and with a countable (possibly infinite) number of players. The result has been achieved as a ...
- research-articleAugust 2021
A Generalized Ky Fan Minimax Inequality on Finite-Dimensional Spaces
Journal of Optimization Theory and Applications (JOPT), Volume 190, Issue 2Pages 343–357https://doi.org/10.1007/s10957-021-01903-1AbstractAn existence result for a generalized inequality over a possible unbounded domain in a finite-dimensional space is established. The proof technique allows to avoid any monotonicity assumption. We adapt a weak coercivity condition introduced in ...
- research-articleSeptember 2019
A coercivity condition for nonmonotone quasiequilibria on finite-dimensional spaces
Journal of Global Optimization (KLU-JOGO), Volume 75, Issue 1Pages 163–176https://doi.org/10.1007/s10898-019-00811-zAbstractNew existence results for quasiequilibrium problems on unbounded feasible sets in a finite-dimensional space and without any assumption of monotonicity are established. The key point behind these results is a weak coercivity condition for a ...
- articleOctober 2018
A Ky Fan Minimax Inequality for Quasiequilibria on Finite-Dimensional Spaces
Journal of Optimization Theory and Applications (JOPT), Volume 179, Issue 1Pages 53–64https://doi.org/10.1007/s10957-018-1319-0Several results concerning existence of solutions of a quasiequilibrium problem defined on a finite-dimensional space are established. The proof of the first result is based on a Michael selection theorem for lower semicontinuous set-valued maps which ...
- articleMarch 2016
Approximate solutions of quasiequilibrium problems in Banach spaces
Journal of Global Optimization (KLU-JOGO), Volume 64, Issue 3Pages 615–620https://doi.org/10.1007/s10898-015-0386-0In this note we show that a recent existence result on quasiequilibrium problems, which seems to improve deeply some well-known results, is not correct. We exhibit a counterexample and we furnish a generalization of a lemma about continuous $$\...
- articleFebruary 2016
Stability and Existence Results for Quasimonotone Quasivariational Inequalities in Finite Dimensional Spaces
Applied Mathematics and Optimization (APMO), Volume 73, Issue 1Pages 137–152https://doi.org/10.1007/s00245-015-9296-2We study pseudomonotone and quasimonotone quasivariational inequalities in a finite dimensional space. In particular we focus our attention on the closedness of some solution maps associated to a parametric quasivariational inequality. From this study ...
- articleDecember 2013
Refinements of existence results for relaxed quasimonotone equilibrium problems
Journal of Global Optimization (KLU-JOGO), Volume 57, Issue 4Pages 1213–1227https://doi.org/10.1007/s10898-012-0021-2We consider a general equilibrium problem in a normed vector space setting and we establish sufficient conditions for the existence of solutions in compact and non compact cases. Our approach is based on the concept of upper sign property for ...
- articleJuly 2013
Closedness of the Solution Map in Quasivariational Inequalities of Ky Fan Type
Journal of Optimization Theory and Applications (JOPT), Volume 158, Issue 1Pages 130–144https://doi.org/10.1007/s10957-012-0221-4This paper is mainly concerned with the stability analysis of the set-valued solution mapping for a parametric quasivariational inequality of Ky Fan type. Perturbations are here considered both on the bifunction and on the constraint map which define ...