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Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826(e) ISSN 0002-9939(p)

     

No $n$-point set is $\sigma$-compact

Author(s): Khalid Bouhjar; Jan J. Dijkstra; R. Daniel Mauldin
Journal: Proc. Amer. Math. Soc. 129 (2001), 621-622.
MSC (2000): Primary 54H05, 57N05, 54G99
Posted: September 27, 2000
MathSciNet review: 1800242
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Abstract | References | Similar articles | Additional information

Abstract: Let $n$ be an integer greater than 1. We prove that there exist no $F_\sigma$-subsets of the plane that intersect every line in precisely $n$ points.


References:

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V. J. Baston and F. A. Bostock, On a theorem of Larman, J. London Math. Soc. (2) 5 (1972), 715-718. MR 47:4138

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K. Bouhjar, J. J. Dijkstra, and J. van Mill, Three-point sets, Topology Appl., to appear.

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H. Federer, Geometric Measure Theory, Springer Verlag, New York, 1969. MR 41:1976

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E. Hewitt and K. Stromberg, Real and Abstract Analysis, Springer Verlag, New York, 1965. MR 32:5826

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D. G. Larman, A problem of incidence, J. London Math. Soc. 43 (1968), 407-409. MR 38:52

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R. D. Mauldin, On sets which meet each line in exactly two points, Bull. London Math. Soc. 30 (1998), 397-403. MR 99f:28010

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W. Sierpinski, Cardinal and Ordinal Numbers, PWN, Warsaw, 1958. MR 20:2288


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Additional Information:

Khalid Bouhjar
Affiliation: Faculty of Sciences, Division of Mathematics and Computer Science, Vrije Universiteit, De Boelelaan 1081 A, 1081 HV Amsterdam, The Netherlands
Email: kbouhjar@cs.vu.nl

Jan J. Dijkstra
Affiliation: Department of Mathematics, The University of Alabama, Box 870350, Tuscaloosa, Alabama 35487-0350
Email: jdijkstr@obelix.math.ua.edu

R. Daniel Mauldin
Affiliation: Department of Mathematics, University of North Texas, Denton, Texas 76203
Email: mauldin@dynamics.math.unt.edu

DOI: 10.1090/S0002-9939-00-05869-X
PII: S 0002-9939(00)05869-X
Received by editor(s): November 30, 1999
Received by editor(s) in revised form: January 7, 2000
Posted: September 27, 2000
Additional Notes: The second author was supported in part by a grant from the Research Advisory Committee of the University of Alabama.
The third author was supported in part by NSF grant DMS-9801583.
Communicated by: Alan Dow
Copyright of article: Copyright 2000, American Mathematical Society




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