ScienceDirect® Home Skip Main Navigation Links
You have guest access to ScienceDirect. Find out more.
 
Home
Browse
My Settings
Alerts
Help
 Quick Search
 Search tips (Opens new window)
    Clear all fields    
 
Font Size: Decrease Font Size  Increase Font Size
 Abstract - selected
Purchase PDF (198 K)

Article Toolbox
 
 
 
Related Articles in ScienceDirect
View More Related Articles
 
View Record in Scopus
 
doi:10.1016/0097-3165(86)90122-6    
How to Cite or Link Using DOI (Opens New Window)

Copyright © 1986 Published by Elsevier Inc.

Note

The number of small semispaces of a finite set of points in the plane

Purchase the full-text article



References and further reading may be available for this article. To view references and further reading you must purchase this article.

Noga Alon* and E. Györi

Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

Mathematical Institute of the Hungarian Academy of Sciences, Budapest, Hungary


Received 22 May 1984. 
Communicated by the Managing Editors 
Available online 7 September 2004.

Abstract

For a configuration S of n points in the plane, let gk(S) denote the number of subsets of cardinality less-than-or-equals, slantk cut off by a line. Let gk,n = max{gk(S): |S| = n}. Goodman and Pollack (J. Combin. Theory Ser. A 36 (1984), 101–104) showed that if k < n/2 then gk,n less-than-or-equals, slant 2nk − 2k2k. Here we show that gk,n = k·n for k < n/2.

Article Outline

• References

* Research supported in part by the Weizmann Fellowship for Scientific Research.


 
Home
Browse
My Settings
Alerts
Help
Elsevier.com (Opens new window)
About ScienceDirect  |  Contact Us  |  Information for Advertisers  |  Terms & Conditions  |  Privacy Policy
Copyright © 2008 Elsevier B.V. All rights reserved. ScienceDirect® is a registered trademark of Elsevier B.V.