Existence of equilibrium in an abstract economy without SS-convexity

摘要

In this paper, we introduce the concept of Delta-convexity in an abstract economy with all choice sets being general topological spaces. We give a new generalization of the classical Yannelis-Prabhakar equilibrium existence theorem in abstract economies by relaxing SS-convexity to Delta-convexity. (C) 2020 Elsevier B.V. All rights reserved.