Middendorf, M., F. Pfeiffer, The max clique problem in classes of string-graphs, Discrete Mathematics 108 (1992) 365-372. A string-graph is an intersection graph of a set of curves in the plane. Investigating the complexity of the max clique problem for some classes of string-graphs we obtain NPcomp
The performance of an eigenvalue bound on the max-cut problem in some classes of graphs
β Scribed by C. Delorme; S. Poljak
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 683 KB
- Volume
- 111
- Category
- Article
- ISSN
- 0012-365X
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β¦ Synopsis
Delorme, C. and S. Poljak, The performance of an eigenvalue bound on the max-cut problem in some classes of graphs, Discrete Mathematics 111 (1993) 145-156.
The authors earlier introduced a number q(C), which gives a well-computable upper bound on the maximum bipartite subgraph of a graph or, more generally, on the maximum cut of a weighted graph. In this paper we study the performance of this bound on a large variety of examples from the graph theory. We also present an alternative definition of v(C) using a graph operation of vertex-splitting.
Finally, we present the results of some preliminary computational experiments on randomly generated graphs.
π SIMILAR VOLUMES
## Abstract We produce in this paper an upper bound for the number of vertices existing in a clique of maximum cardinal. The proof is based in particular on the existence of a maximum cardinal clique that contains no vertex __x__ such that the neighborhood of __x__ is contained in the neighborhood