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math.CO2021
Universal sequences of lines in
Imre Bárány, Gil Kalai, Attila Pór
One of the most important and useful examples in discrete geometry is a finite sequence of points on the moment curve or, more generally, on a {\it st…
math.CO2020
Random bipartite posets and extremal problems
Csaba Biró, Peter Hamburger, H. A. Kierstead +3
Previously, Erdős, Kierstead and Trotter investigated the dimension of random height~ partially ordered sets. Their research was motivated primarily by two goals: (1)~analyzing…
math.CO2010
Blocking Coloured Point Sets
Greg Aloupis, Brad Ballinger, Sébastien Collette +3
This paper studies problems related to visibility among points in the plane. A point \emph{blocks} two points and if is in the interior of the line segment $\bar{vw…