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The Solution to a Problem of Grünbaum

Published online by Cambridge University Press:  20 November 2018

Peter Salamon and
Paul Erdös
Peter Salamon
Affiliation:
Department of Mathematical Sciences, San Diego State University, San Diego CA 92182
Paul Erdös
Affiliation:
Hungarian Academy of Sciences, Budapest, Hungary
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Abstract

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The paper characterizes the set of all possible values for the number of lines determined by n points for n sufficiently large. For the lower bound of Kelly and Moser for the number of lines in a configuration with n — k collinear points is shown to be sharp and it is shown that all values between M min(k) and M max(k) are assumed with the exception of M max — 1 and M max — 3. Exact expressions are obtained for the lower end of the continuum of values leading down from In particular, the best value of c = 1 is obtained in Erdös’ previous expression for this lower end of the continuum.

Keywords

05-A15

Information

Type
Research Article
Information
Canadian Mathematical Bulletin , Volume 31 , Issue 2 , 01 June 1988, pp. 129 - 138
Copyright
Copyright © Canadian Mathematical Society 1988

References

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