FOUNDATIONS OF THE KKM THEORY VIA COINCIDENCES OF COMPOSITES OF UPPER SEMICONTINUOUS MAPS
Seh-Ie Park · Journal of the Korean Mathematical Society · 1994
In the KKM theory, there exist mutually equivalent fundamental theorems from which most of the other important results in the theory can be deduced. We give such fundamental theorems related to composites of upper semicontinuous (u.s.c.) multifunctions in a very large class.