124 search results - page 8 / 25 » Crossing Number of Toroidal Graphs |
JCT
2007
13 years 7 months ago
2007
A topological graph is quasi-planar, if it does not contain three pairwise crossing edges. Agarwal et al. [2] proved that these graphs have a linear number of edges. We give a sim...
SIAMCOMP
2000
13 years 7 months ago
2000
The bipartite crossing number problem is studied, and a connection between this problem and the linear arrangement problem is established. It is shown that when the arboricity is ...
GD
2009
Springer
13 years 10 months ago
2009
Springer
We show that recognizing intersection graphs of convex sets has the same complexity as deciding truth in the existential theory of the reals. Comparing this to similar results on t...
ALGORITHMICA
2008
13 years 7 months ago
2008
Given a graph with edges colored Red and Blue, we wish to sample and approximately count the number of perfect matchings with exactly k Red edges. We study a Markov chain on the sp...
STACS
2005
Springer
14 years 29 days ago
2005
Springer
Abstract. We present a mathematical model to analyse the establishment and maintenance of communication between mobile agents. We assume that the agents move through a fixed envir...