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Journal of Convex Analysis 11 (2004), No. 1, 245--250
Copyright Heldermann Verlag 2004
A Characterization of Polyhedral Convex Sets
Farhad Hüsseinov
Dept. of Economics, Bilkent University, 06533 Ankara, Turkey,
farhad@bilkent.edu.tr
This paper describes a class of convex closed sets, S, in Rn for
which the following property holds: for every correspondence defined on a
probability space with relative open values in S its integral is a relative
open subset of S. It turns out, that the only closed convex sets in Rn
having this property are generalized polyhedral convex sets. In particular, the
only compact convex sets in Rn having this property are polytopes.
Keywords: Polyhedral convex sets, correspondence, locally convex sets.
MSC: 52B99.
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