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Acta Mathematica Vietnamica

ON SOME GENERALIZED VECTOR EQUILIBRIUM PROBLEMS WITH SET-VALUED MAPS

LE ANH TUAN, PHAM HUU SACH

Abstract

In this paper we consider the generalized vector equilibrium problem (Pα) of 0nding a point z0,x0)E×K such that x0A(z0,x0) and ηA(z0,x0),zB(z0,x0,η),(F(z,x0,η),C(z,x0,η))α, where α is an arbitrary relation on 2Y, and A,B,C and F are set-valued maps between finite-dimensional spaces. Existence results are obtained under assumptions di3erent from those of [17]. Some special cases of Problem (Pα) are discussed in detail.