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Article . 2002
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https://doi.org/10.1007/1-4020...
Part of book or chapter of book . 2005 . Peer-reviewed
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On the Lefschetz Fixed Point Theorem

On the Lefschetz fixed point theorem
Authors: Górniewicz, Lech;

On the Lefschetz Fixed Point Theorem

Abstract

The abstract version of the Lefschetz fixed point theorem is proved which states the following: If \(X\) is a metric space and if \(X_0\subset X\) is such that \(X_0\) absorbs compact sets, \(f\:X\to X\) is a continuous map, \(f(X_0) \subset X_0\) and \(f/X_0\) is a Lefschetz map, then \(f\) is also (on \(X\)) a Lefschetz map. Here a continuous map \(f\:X\to X\) is called a Lefschetz map if the generalized Lefschetz number \(\Lambda (f)\) of \(f\) is well defined and \(\Lambda (f) \neq 0\) implies that the set Fix\((f)\neq 0\). From that theorem three relative versions of the Lefschetz fixed point theorem are deduced which are connected with condensing and \(k\)-set contraction mappings.

Keywords

Fixed-point theorems, Fixed points and coincidences in algebraic topology, Degree theory for nonlinear operators, fixed point, Fixed-point and coincidence theorems (topological aspects), Lefschetz number, ANR-space, condensing map, CAC-map

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selected citations
These citations are derived from selected sources.
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!
1
Average
Average
Average