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Other literature type . 1993
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Topological Methods in Nonlinear Analysis
Article . 1993 . Peer-reviewed
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Examples related to Ulam's fixed point problem

Authors: Kuperberg, Krystyna M.; Kuperberg, Włodzimierz; Minc, Piotr; Reed, Coke S.;

Examples related to Ulam's fixed point problem

Abstract

The paper deals with several examples related to the following problem posed by \textit{S. Ulam}: given a continuum (connected compact metric space) \(M\), does there exist a constant \(\varepsilon > 0\) such that any \(\varepsilon\)-map \(f: M\to M\) (i.e. continuous map whose trajectories \(\{f^ n(x)\}^ \infty_{n=0}\), \(x\in M\), are bounded by \(\varepsilon\)), possess a fixed point? An example of a one-dimensional continuum such that for any \(\varepsilon\) there is a fixed point free \(\varepsilon\)-involution is given. Then it is shown that the Cartesian product of the circle and the Hilbert cube for any \(\varepsilon > 0\) admits a fixed point free \(\varepsilon\)-homeomorphism. At last an example of the rest point free dynamical system with trajectories uniformly bounded by arbitrary \(\varepsilon > 0\) defined on a three-dimensional manifold is provided.

Keywords

Fixed-point and coincidence theorems (topological aspects), Dynamics induced by flows and semiflows, continuum, Topological dynamics, dynamical system

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
Green
bronze