Mathematical Programming: Series A and B
Generalized monotonicity and generalized convexity
Journal of Optimization Theory and Applications
Generalized monotone bifunctions and equilibrium problems
Journal of Optimization Theory and Applications
Journal of Optimization Theory and Applications
Generalized KKM type theorems in FC-spaces with applications (II)
Journal of Global Optimization
Lexicographic and sequential equilibrium problems
Journal of Global Optimization
A note on stability for parametric equilibrium problems
Operations Research Letters
Local boundedness of monotone bifunctions
Journal of Global Optimization
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In this paper, we consider some well–known equilibrium problems and their duals in a topological Hausdorff vector space X for a bifunction F defined on \kk,where K is a convex subset of X. Some necessary conditions are investigated, proving different results depending on the behaviour of F on the diagonal set. The concept of proper quasimonotonicity for bifunctions is defined, and the relationship with generalized monotonicity is investigated. The main result proves that the condition of proper quasimonotonicity is sharp in order to solve the dual equilibrium problem on every convex set.