Powered by OpenAIRE graph
Found an issue? Give us feedback
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 Journal of Geometryarrow_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
Journal of Geometry
Article . 1984 . 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 . 1984
Data sources: zbMATH Open
versions View all 2 versions
addClaim

Preordered affine Hjelmslev planes

Authors: Baker, Catharine A.; Lane, Norman D.; Lorimer, Joseph W.; Laxton, James A.;

Preordered affine Hjelmslev planes

Abstract

Verf. nennen eine affine Hjelmslev-Ebene (AH-Ebene) \({\mathfrak H}=(P,{\mathfrak L})\) ''prägeordenet'', wenn auf P wie üblich eine ternäre Relation \(\rho\) erklärt ist, so daß die Einschränkung von \(\rho\) auf jede Gerade \(L\in {\mathfrak L}\) eine Zwischenrelation ist und \(\rho\) bei allen bijektiven Parallelperspektivitäten [\(A\to^{C}B]\) erhalten bleibt. Für A,B,\(C\in {\mathfrak L}\) ist [\(A\to^{C}]\) bijektiv, wenn der Fernpunkt von C weder zu dem Fernpunkt von A noch dem von B benachbart ist. Jede Nachbarschaftsklasse eines Punktes erweist sich als konvex und in der zugehörigen affinen Ebene (\=P,\(\bar {\mathfrak L})\) wird daher eine Anordnung \({\bar \rho}\) im üblichen Sinne induziert. Eine ''prägeordnete'' AH-Ebene (P,\({\mathfrak L},\rho)\) heißt angeordnet, wenn für jede Parallelperspektivität \(\pi =[A\to^{C}B]\) (hier wird nur verlangt: Fernpunkt von C ist nicht benachbart zum Fernpunkt von B) gilt: Für x,y,\(z\in A\) mit (x,y,z)\(\in \rho\) und \(\pi\) (X)\(\neq \pi(Y)\neq \pi(Z)\neq \pi(X)\) gilt (\(\pi\) (X),\(\pi\) (Y),\(\pi\) (Z))\(\in \rho\). Analog zu der Hallschen Koordinatisierung affiner Ebenen durch ternäre Ringe läßt sich jede AH-Ebene \({\mathfrak H}\) durch biternäre Ringe \({\mathfrak M}\) koordinatisieren. Jede Präordnung, \(\rho\) auf \({\mathfrak H}\) induziert in \({\mathfrak M}\) eine totale Ordnungsrelation \(<\), die gewissen Monotoniegesetzen genügt und dann Präordnung von \({\mathfrak M}\) genannt wird. Nach den gleichen Gesichtspunkten, die wir aus der affinen (und projektiven) Geometrie kennen, werden hier für eine AH-Ebene die wechselseitigen Beziehungen zwischen geometrischer und algebraischer Präordnung untersucht. Die erzielten Resultate werden mit Ergebnissen von \textit{F. Machala} [Czech. Math. J. 30 (105), 341-356 (1980; Zbl 0459.51011; Cas. Pestovani Mat. 106, 138-155 (1981; Zbl 0475.51003), 269- 278 (1981; Zbl 0476.51004)] über angeordnete Klingenberg-Ebenen verglichen.

Keywords

Ordered geometries (ordered incidence structures, etc.), preordered biternary rings, Ring geometry (Hjelmslev, Barbilian, etc.), preordered affine Hjelmslev plane

  • BIP!
    Impact byBIP!
    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).
    4
    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.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
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
Average
Average
Related to Research communities
Upload OA version
Are you the author of this publication? Upload your Open Access version to Zenodo!
It’s fast and easy, just two clicks!