Order-clustered fixed point theorems on chain-complete preordered sets and their applications to extended and generalized Nash equilibria
Linsen Xie, Jinlu Li, Wenshan Yang · Fixed Point Theory and Applications · 2013
Abstract In this paper, we introduce the concept of order-clustered fixed point of set-valued mappings on preordered sets and give several generalizations of the extension of the Abian-Brown fixed point theorem provided in (Mas-Colell et al. in Microeconomic Theory, 1995), which is from chain-complete posets to chain-complete preordered sets. By using these generalizations and by applying the order-increasing upward property of set-valued mappings, we prove several existence theorems of the extended and generalized Nash equilibria of nonmonetized noncooperative games on chain-complete preordered sets. MSC:46B42, 47H10, 58J20, 91A06, 91A10.