A graph is an intersection graph if it is possible to assign sets to its vertices so that adjacency corresponds exactly to nonempty intersection. If the sets assigned to vertices must belong to a pre-specified family, the resulting class of all possible intersection graphs is called an intersection
Measuring the vulnerability for classes of intersection graphs
โ Scribed by Dieter Kratsch; Ton Kloks; Haiko Muller
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 780 KB
- Volume
- 77
- Category
- Article
- ISSN
- 0166-218X
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โฆ Synopsis
A general method for the computation of various parameters measuring the vulnerability of a graph is introduced. Four measures of vulnerability are considered, i.e., the toughness, scattering number, vertex integrity and the size of a minimum balanced separator. We show how to compute these parameters by polynomial-time algorithms for various classes of intersection graphs like permutation graphs, bounded dimensional cocomparability graphs, interval graphs, trapezoid graphs and circular versions of these graph classes.
๐ SIMILAR VOLUMES
Maehara, H., The intersection graph of random sets, Discrete Mathematics 87 (1991) 97-104. Let X,, i=l,..., n, be n = n(N) independent random subsets of {1,2,. . , N}, each selected at random out of the 2N subsets. We present some asymptotic (N-tm) properties of {Xi}, e.g. if r~/2~'~--+ m then {Xi}
The subdivision threshold for a graph F is the maximum number of edges, ex(n; FS), a graph of order n can have without containing a subdivision of F as a subgraph. We consider two instances: (i) F is the graph formed by a cycle C one vertex of which is adjacent to k vertices not on C, and (ii) F is