Weakly strict equilibria in finite normal form games

In this paper the authors introduce the weakly strict equilibrium for (mixed extensions of) finite n-person games. For those games they prove that the present new concept is a strict refinement of the undominated Nash equilibrium concept. The authors show that their set of weakly strict equilibria is non-empty and coincides with their set of strict equilibria (when the latter is also non-empty) and they study the relation between the present refinement and other noncooperative concepts.