Iranian Mathematical Society (IMS)Bulletin of the Iranian Mathematical Society1017-060X41320150615Optimality conditions for Pareto efficiency and proper ideal point in set-valued nonsmooth vector optimization using contingent cone759770648ENY. F.ChaiDepartment of
Mathematics, Xidian University, Xi'an 710071, ChinaS. Y.LiuDepartment of
Mathematics, Xidian University, Xi'an 710071, ChinaJournal Article20130904In this paper, we first present a new important property for Bouligand tangent cone (contingent cone) of a star-shaped set. We then establish optimality conditions for Pareto minima and proper ideal efficiencies in nonsmooth vector optimization problems by means of Bouligand tangent cone of image set, where the objective is generalized cone convex set-valued map, in general real normed spaces.http://bims.iranjournals.ir/article_648_0752152377cd9d137832342eff76106d.pdf