226 search results - page 6 / 46 » Lower bounds on the obstacle number of graphs |
SODA
2003
ACM
13 years 9 months ago
2003
ACM
We prove a lower bound of 0.3288 n 4¡ for the rectilinear crossing number cr(Kn) of a complete graph on n vertices, or in other words, for the minimum number of convex quadril...
COCOA
2010
Springer
13 years 5 months ago
2010
Springer
Abstract. For a fixed integer k 0, a k-transmitter is an omnidirectional wireless transmitter with an infinite broadcast range that is able to penetrate up to k "walls",...
CORR
2010
Springer
13 years 4 months ago
2010
Springer
We introduce a new technique for proving kernelization lower bounds, called cross-composition. A classical problem L cross-composes into a parameterized problem Q if an instance o...
NETWORKS
2008
13 years 7 months ago
2008
In a problem arising in grooming for two-period optical networks, it is required to decompose the complete graph on n vertices into subgraphs each containing at most C edges, so t...
CORR
2008
Springer
13 years 8 months ago
2008
Springer
Linearity tests are randomized algorithms which have oracle access to the truth table of some function f, and are supposed to distinguish between linear functions and functions whi...