Hostname: page-component-77c89778f8-gq7q9 Total loading time: 0 Render date: 2024-07-21T08:30:39.206Z Has data issue: false hasContentIssue false

A family of 2-dimensional Laguerre planes of generalised shear type

Published online by Cambridge University Press:  17 April 2009

B. Polster
Affiliation:
Department of Pure Mathematics, The University of Adelaide, South Australia 5005, Australia, e-mail: [email protected]
G. F. Steinke
Affiliation:
Department of Mathematics and Statistics, University of Canterbury, Private Bag 4800, Christchurch, New Zealand, e-mail: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We construct a family of 2-dimensional Laguerre planes that generalises ovoidal Laguerre planes and the Laguerre planes of shear type, as described by Löwen and Pfüller, by gluing together circle sets from up to eight different ovoidal Laguerre planes. Each plane in this family admits all maps (x, y) ↦ (x, ry) for r > 0 as central automorphisms at the circle y = 0.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 2000

References

REFERENCES

[1]Artzy, R. and Groh, H., ‘Laguerre and Minkowski planes produced by dilatations’, J. Geom. 26 (1986), 120.Google Scholar
[2]Groh, H., ‘Topologische Laguerreebenen I’, Abh. Math. Sem. Univ. Hamburg 32 (1968), 216231.Google Scholar
[3]Groh, H., ‘Topologische Laguerreebenen II’, Abh. Math. Sem. Univ. Hamburg 34 (1970), 1121.CrossRefGoogle Scholar
[4]Hartmann, E., ‘Moulton Laguerre-ebenen’, Arch. Math. 27 (1976), 424435.CrossRefGoogle Scholar
[5]Löwen, R. and Pfüller, U., ‘Two-dimensional Laguerre planes over convex functions’, Geom. Dedicata 23 (1987), 7385.Google Scholar
[6]Polster, B. and Steinke, G.F., ‘Criteria for two-dimensional circle planes’, Beitrage Algebra Geom. 35 (1994), 181191.Google Scholar
[7]Polster, B. and Steinke, G.F., ‘Cut and paste in 2-dimensional circle planes’, Canad. Math. Bull. 38 (1995), 469480.CrossRefGoogle Scholar
[8]Polster, B. and Steinke, G.F., ‘The inner and outer space of 2-dimensional Languerre planes’, J. Austral. Math. Soc. Ser. A 62 (1997), 104127.CrossRefGoogle Scholar
[9]Polster, B. and Steinke, G.F., ‘Separating sets in topological geometries’, (preprint).Google Scholar
[10]Polster, B., Rosehr, N. and Steinke, G.F., ‘Half-ovoidal flat Laguerre planes’, J. Geom. 60 (1997), 113126.Google Scholar
[11]Salzmann, H., ‘Topological planes’, Adv. Math. 2 (1967), 160.CrossRefGoogle Scholar
[12]Steinke, G.F., ‘Topological affine planes composed of two Desarguesian halfplanes and projective planes with trivial collineation group’, Arch. Math. 44 (1985), 472480.CrossRefGoogle Scholar
[13]Steinke, G.F., ‘Semiclassical topological flat Laguerre planes obtained by pasting along a circle’, Resultate Math. 12 (1987), 207221.CrossRefGoogle Scholar
[14]Steinke, G.F., ‘Semiclassical topological flat Laguerre planes obtained by pasting along two parallel classes’, J. Geom. 32 (1988), 133156.Google Scholar
[15]Steinke, G.F., ‘A classification of 2-dimensional Laguerre planes admitting 3-dimensional groups of automorphisms in the kernel’, (preprint).Google Scholar
[16]Steinke, G.F., ‘2-dimensional Laguerre planes admitting 4-dimensional groups of automorphisms that fix at least two parallel classes’, (preprint).Google Scholar