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RSA
1998
105views more  RSA 1998»
13 years 9 months ago
The chromatic numbers of random hypergraphs
: For a pair of integers 1F␥-r, the ␥-chromatic number of an r-uniform Ž .hypergraph Hs V, E is the minimal k, for which there exists a partition of V into subsets < <T ...
Michael Krivelevich, Benny Sudakov
CORR
2010
Springer
55views Education» more  CORR 2010»
13 years 9 months ago
Prediction with Advice of Unknown Number of Experts
In the framework of prediction with expert advice, we consider a recently introduced kind of regret bounds: the bounds that depend on the effective instead of nominal number of ex...
Alexey V. Chernov, Vladimir Vovk
CORR
2011
Springer
174views Education» more  CORR 2011»
13 years 5 months ago
Lower bounds on the obstacle number of graphs
Given a graph G, an obstacle representation of G is a set of points in the plane representing the vertices of G, together with a set of connected obstacles such that two vertices ...
Padmini Mukkamala, János Pach, Döm&oum...
EM
2010
124views Management» more  EM 2010»
13 years 5 months ago
On the Distribution of Class Groups of Number Fields
We propose a modification of the predictions of the Cohen
Gunter Malle
MFCS
2004
Springer
14 years 3 months ago
Crossing Number Is Hard for Cubic Graphs
It was proved by [Garey and Johnson, 1983] that computing the crossing number of a graph is an NP-hard problem. Their reduction, however, used parallel edges and vertices of very h...
Petr Hlinený