International Journal of Mathematics and Mathematical Sciences
Volume 2003 (2003), Issue 51, Pages 3267-3276
KKM theorem with applications to lower and upper bounds equilibrium problem in -convex spaces
Department of Mathematics, University of Isfahan, Isfahan 81745-163, Iran
Received 9 November 2002
Copyright © 2003 M. Fakhar and J. Zafarani. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
We give some new versions of KKM theorem
for generalized convex spaces. As an application, we answer a
question posed by Isac et al. (1999) for the lower and upper
bounds equilibrium problem.