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A non-linear lower bound for planar epsilon-nets

Presented by: 
N Alon [Tel Aviv University and IAS, Princeton]
Date: 
Tuesday 11th January 2011 - 15:30 to 16:30
Venue: 
INI Seminar Room 1
Abstract: 
After a brief description of the notion of epsilon-nets for range spaces and of the main known results about them, I will show that the minimum possible size of an epsilon-net for point objects and line (or rectangle)-ranges in the plane is (slightly) bigger than linear in 1/epsilon. This settles a problem raised by Matousek, Seidel and Welzl in 1990.
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University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons