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Abstract
We prove new existence results of fixed points for upper semicontinuous multi-valued maps with not necessarily convex values. We study two cases, according to whether the maps are defined on contractible spaces or on convex subsets of topological vector spaces possessing the simplicial approximation property
Author information
Contact details are reproduced from the original publication and may be historical.
YA
Youcef Askoura
UFR Sciences Techniques, Lab. de Mathématiques, Université de Bretagne Occ., 6 Av. Victor Le Gorgeu, 29283 Brest, France
Y. Askoura, Ch. Godet-Thobie. “Fixed Points in Contractible Spaces and Convex Subsets of Topological Vector Spaces.” Journal of Convex Analysis 13 (2006), No. 2, 193–205.