16 search results - page 2 / 4 » Laplacian spectral bounds for clique and independence number... |
GC
2002
Springer
13 years 5 months ago
2002
Springer
Given a graph on n vertices which is the union of two comparability graphs on the same vertex set, it always contains a clique or independent set of size n 1 3 . On the other hand...
CORR
2010
Springer
13 years 2 months ago
2010
Springer
We present a method for proving upper bounds on the eigenvalues of the graph Laplacian. A main step involves choosing an appropriate "Riemannian" metric to uniformize th...
SWAT
1994
Springer
13 years 9 months ago
1994
Springer
Abstract. Finding maximum independent sets in graphs with bounded maximum degree is a well-studied NP-complete problem. We introduce an algorithm schema for improving the approxim...
GC
2008
Springer
13 years 5 months ago
2008
Springer
In this paper we study the class of weakly quasi-threshold graphs that are obtained from a vertex by recursively applying the operations (i) adding a new isolated vertex, (ii) addi...
CORR
2011
Springer
12 years 9 months ago
2011
Springer
We present an approximation scheme for optimizing certain Quadratic Integer Programming problems with positive semidefinite objective functions and global linear constraints. Thi...