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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Semigroup Forumarrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Semigroup Forum
Article . 1996 . Peer-reviewed
License: Springer TDM
Data sources: Crossref
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
zbMATH Open
Article . 1996
Data sources: zbMATH Open
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Semigroups with strong and nonstrong magnifying elements

Authors: Gutan, M.;

Semigroups with strong and nonstrong magnifying elements

Abstract

An element \(a\) of a semigroup \(S\) is a left (right) magnifying element if \(aM=S\) (\(Ma=S\)) for some proper subset \(M\) of \(S\). It is a strong left (right) magnifying element if \(aT=S\) (\(Ta=S\)) for some proper subsemigroup \(T\) of \(S\). In [Semigroup Forum 48, No. 1, 119-126 (1994; Zbl 0805.20050)], the reviewer reiterated the observation of \textit{F. Catino} and \textit{F. Migliorini} [ibid. 44, No. 3, 314-319 (1992; Zbl 0746.20035)] that no one to that time had produced a semigroup which contains both strong and nonstrong left magnifying elements. Well, now someone has. Let \(LM(S)\) and \(\overline{LM}(S)\) denote the collections of left magnifying elements and strong left magnifying elements, respectively, of a semigroup \(S\). The author proves that if \(S\) and \(T\) are two semigroups such that (1) Neither \(S\) nor \(T\) has a left identity and (2) \(LM(S)\neq\emptyset\), \(\overline{LM}(S)=\emptyset\), and \(\text{LM}(T)\neq\emptyset\), then \(S\times T\) contains both strong and nonstrong left magnifying elements. He applies this result to the bicyclic semigroup \(\mathcal T\) and the Baer-Levi semigroup \(\mathcal B\) to show that \({\mathcal T}\times{\mathcal B}\) contains both strong and nonstrong left magnifying elements.

Country
Germany
Keywords

510.mathematics, Ideal theory for semigroups, nonstrong left magnifying elements, bicyclic semigroup, Baer-Levi semigroup, General structure theory for semigroups, Article, strong left magnifying elements

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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!
14
Top 10%
Top 10%
Average
Green
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