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Proceedings of the American Mathematical Society
Article . 1956 . Peer-reviewed
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Proceedings of the American Mathematical Society
Article . 1956 . Peer-reviewed
Data sources: Crossref
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A fixed point theorem

Authors: Eldon Dyer;
Abstract

Suppose that space is metric. A chain is a finite collection of open sets d1, d2, * * * , dn such that di intersects dj if and only if I i-jj I 1. If the elements of a chain are of diameter less than a positive number e, that chain is said to be an e-chain. A compact continuum is said to be chainable if for each positive number e, there is an e-chain covering it. R. H. Bing has called [1] such continua snake-like. In 1951 0. H. Hamilton showed [4] that every compact chainable continuum has the fixed point property; i.e., that if f is a continuous mapping of such a continuum M into itself, then some point of M is its own image underf. In the present paper it is shown that the Cartesian product of finitely many compact chainable continua has the fixed point property. Since arcs are compact chainable continua, this is a generalization of the Brouwer fixed point theorem. Two other examples of compact chainable continua are the closure of the graph of sin (1/x), 0

Keywords

topology

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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!
18
Average
Top 10%
Average
bronze