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Abstract and Applied Analysis
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Transfinite methods in metric fixed‐point theory

Transfinite methods in metric fixed-point theory
Authors: Kirk, W. A.;

Transfinite methods in metric fixed‐point theory

Abstract

This is a brief survey of the use of transfinite induction in metric fixed‐point theory. Among the results discussed in some detail is the author′s 1989 result on directionally nonexpansive mappings (which is somewhat sharpened), a result of Kulesza and Lim giving conditions when countable compactness implies compactness, a recent inwardness result for contractions due to Lim, and a recent extension of Caristi′s theorem due to Saliga and the author. In each instance, transfinite methods seem necessary.

Related Organizations
Keywords

contractions, metric fixed point theory, Fixed-point and coincidence theorems (topological aspects), iteration scheme, Research exposition (monographs, survey articles) pertaining to general topology, nonexpansive mappings, 74H10, 54H10, Fixed-point theorems, QA1-939, transfinite induction, Mathematics

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    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).
    13
    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.
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    influence
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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!
13
Average
Average
Average
gold