The Australian Journal of Mathematical Analysis and Applications

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ISSN 1449-5910  


Paper Information

Paper Title:

A Coincidence Theorem for Two Kakutani Maps


Mircea Balaj

Department of Mathematics,
University of Oradea,
410087, Oradea,


In this paper we prove the following theorem: Let X be a nonempty compact convex set in a locally convex Hausdorff topological vector space, D be the set of its extremal points and F,T: XX two Kakutani maps; if for each nonempty finite subset A of D and for any x ∈ coA, F (x) coA ≠ , then F and T have a coincidence point. The proof of this theorem is given first in the case when X is a simplex, then when X is a polytope and finally in the general case. Several reformulations of this result are given in the last part of the paper.


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