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arXiv · 2610.41439

Stability of ideal Nash equilibrium points in generalized multi-criteria games, interval-valued games, and existence in single-leader--multi-follower problems

Urairat Deepan·Poom Kumam·Parin Chaipunya
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Abstract

We study the stability of ideal Nash equilibria in generalized multi-criteria games, in which each player's vector-valued payoff is ordered by a closed cone and the feasible strategy sets depend on the other players' strategies. Under compactness and continuity assumptions, the ideal Nash equilibrium correspondence is upper semicontinuous on the class of games admitting an ideal equilibrium. Our main result does not require the ordering cones to be convex or pointed. In fact, the ideal equilibria are exactly the common equilibria of associated scalar games when all the cones are convex. As consequences of our results, the stability of interval-valued games is derived and existence theorems for single-leader-multi-follower problems are proved for both optimistic and pessimistic sense.

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Urairat Deepan, Poom Kumam, Parin Chaipunya. 2026-10-30. Stability of ideal Nash equilibrium points in generalized multi-criteria games, interval-valued games, and existence in single-leader--multi-follower problems. https://arxiv.org/abs/2610.41439

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