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Bruck nets and partial sherk planes

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Title: Bruck nets and partial sherk planes
Authors: Bamberg, J
Fawcett, JB
Lansdown, J
Item Type: Journal Article
Abstract: In Bachmann [Aufbau der Geometrie aus dem Spiegelungsbegriff, Die Grundlehren der mathematischen Wissenschaften, Bd. XCVI (Springer, Berlin-Göttingen-Heidelberg, 1959)], it was shown that a finite metric plane is a Desarguesian affine plane of odd order equipped with a perpendicularity relation on lines and that the converse is also true. Sherk ['Finite incidence structures with orthogonality', Canad. J. Math. 19 (1967), 1078-1083] generalised this result to characterise the finite affine planes of odd order by removing the 'three reflections axioms' from a metric plane. We show that one can obtain a larger class of natural finite geometries, the so-called Bruck nets of even degree, by weakening Sherk's axioms to allow noncollinear points.
Issue Date: 1-Feb-2018
Date of Acceptance: 2-Feb-2017
URI: http://hdl.handle.net/10044/1/64357
DOI: https://dx.doi.org/10.1017/S144678871700009X
ISSN: 1446-7887
Publisher: Cambridge University Press (CUP)
Start Page: 1
End Page: 12
Journal / Book Title: Journal of the Australian Mathematical Society
Volume: 104
Issue: 1
Copyright Statement: © 2017 Australian Mathematical Publishing Association Inc. This paper has been accepted for publication and will appear in a revised form, subsequent to peer-review and/or editorial input by Cambridge University Press.
Keywords: 0101 Pure Mathematics
General Mathematics
Publication Status: Published
Appears in Collections:Pure Mathematics
Faculty of Natural Sciences
Mathematics