Mindestzahlen von Koinzidenzpunkten.
Homotopy for small multifunctions
Fix-finite approximation of n-valued multifunctions
A fixed point index for bimaps
A minimum theorem for n-valued multifunctions
Fix-finite and fixed point free approximations of symmetric product maps
The least number of fixed points of bimaps
An index and a Nielsen number for n-valued multifunctions
Nielsen theory of transversal fixed point sets (with an appendix: and C0 fixed point sets are the same, by R. E. Greene)
Examples exist of smooth maps on the boundary of a smooth manifold M which allow continuous extensions over M without fixed points but no such smooth extensions. Such maps are studied here in more detail. They have a minimal fixed point set when all transversally fixed maps in their homotopy class are considered. Therefore we introduce a Nielsen fixed point theory for transversally fixed maps on smooth manifolds without or with boundary, and use it to calculate the minimum number of fixed points...
A Kakutani type coincidence theorem
Fixed point sets of homeomorphisms on dendrites
Simplicial approximation of small multifunctions
A Nielsen number for fixed points and near points of small multifunctions
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