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zbMATH Open
Article . 1958
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Proceedings of the American Mathematical Society
Article . 1958 . Peer-reviewed
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Proceedings of the American Mathematical Society
Article . 1958 . Peer-reviewed
Data sources: Crossref
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One-Parameter Transformation Groups in the Plane

One-parameter transformation groups in the plane
Authors: Mostert, Paul S.;

One-Parameter Transformation Groups in the Plane

Abstract

PROOF. Let xEE. Since x is not fixed under R, there is a closed interval [-a, a ] = T about 0 in R, and an arc CCE, xE C but not an end point of C, such that T2(C) is a compact neighborhood of x and the mapping (t, c)->t(c) is one to one from T2X C-->T2(C). That is, C is a local cross section to the local orbits of T2 [1]. We shall show that C is a local cross section for the orbits of R. Suppose, on the contrary, that for some zECC, there is an r>a such that r(z)EzT(C). Let b be the greatest lower bound of such numbers. Then b(z)E-a(C), for if not, say b(z)=t(c), tGET, cCC, and t >-a, then there is a t', -a -a. Hence (b+t')(z)=(t+t')(c)CET(C). But t'

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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!
4
Average
Top 10%
Average
bronze