- - - Arak University
- - - Department of Mathematics, Faculty of Science, Arak University, Arak, Iran
- - - Department of Mathematics, Arak University, Arak, Iran

In this paper, by using C-sequentially sign property for bifunctions, we provide sufficient conditions that ensure the existence of solutions of some vector equilibrium problems in Hausdorff topological vector spaces which ordered by a cone. The conditions which we consider are not imposed on the whole domain of the operators involved, but just on a locally segment-dense subset of the domain.

locally segment-dense set, vector equilibrium problem, C-sequentially sign property