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Journal of Geometry
Article . 2001 . 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 . 2001
Data sources: zbMATH Open
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Finite Minkowski planes and embedded inversive planes

Authors: RINALDI, Gloria;

Finite Minkowski planes and embedded inversive planes

Abstract

In [J. Geom. 41, 145-156 (1991; Zbl 0735.51003)] \textit{P. Quattrocchi} and the author constructed an inversive plane from a Minkowski plane \({\mathcal M}\) as the geometry of points and blocks fixed by an automorphism \(\varphi\) of \({\mathcal M}\) that exchanges the two families of generators and fixes at least four points not on a block. The inversive plane obtained is then called \(\varphi\)-embedded into \({\mathcal M}\). In the paper under review the author continues her investigation of finite inversive planes \({\mathcal I}\) embedded (not necessarily \(\varphi\)-embedded) into Minkowski planes \({\mathcal M}\), that is, the point set of \({\mathcal I}\) is a subset of the point set of \({\mathcal M}\), circles of \({\mathcal I}\) are traces of blocks of \({\mathcal M}\) and tangency of circles in \({\mathcal I}\) is induced by the tangency of blocks in \({\mathcal M}\). Starting from a Miquelian Minkowski plane of order \(p^m\) the above construction for the automorphism \(\varphi:(x,y)\mapsto(y^{p^t},x^{p^t})\) is applied to obtain a \(\varphi\)-embedded inversive plane \(M(p^t)\) of order \(p^t\) for each positive integer \(t\) such that \(2t\) divides \(m\). (No \(\varphi\)-embedding can exist if \(m\) is odd; loc. cit.) It is then shown that, in fact, each such inversive plane \(M(p^t)\) is contained in each of the known finite Minkowski planes \({\mathcal M}(p^m,\sigma)\) of the same order \(p^m\), where \(\sigma\) is an automorphism of the Galois field GF\((p^m)\), and thus is embedded in \({\mathcal M}(p^m,\sigma)\). Furthermore, \(M(p^t)\) admits PSL\((2,p^{2t})\) as a group of automorphisms and hence must be Miquelian.

Country
Italy
Keywords

Minkowski plane, Minkowski geometries in nonlinear incidence geometry, inversive plane, Other finite nonlinear geometries, Minkowski planes; Inversive planes., Möbius geometries

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selected citations
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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).
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.
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