## Abstract An equistable graph is a graph for which the incidence vectors of the maximal stable sets are the 0β1 solutions of a linear equation. A necessary condition and a sufficient condition for equistability are given. They are used to characterize the equistability of various classes of perfe
Equistable chordal graphs
β Scribed by Uri N. Peled; Udi Rotics
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 130 KB
- Volume
- 132
- Category
- Article
- ISSN
- 0166-218X
No coin nor oath required. For personal study only.
β¦ Synopsis
A graph is called equistable when there is a non-negative weight function on its vertices such that a set S of vertices has total weight 1 if and only if S is maximal stable. We show that a chordal graph is equistable if and only if every two adjacent non-simplicial vertices have a common simplicial neighbor. ?
π SIMILAR VOLUMES
A graph is called equistable when there is a non-negative weight function on its vertices such that a set S of vertices has total weight 1 if and only if S is maximal stable. We characterize those series-parallel graphs that are equistable, generalizing results of Mahadev et al. about equistable out
Let be the induced-minor relation. It is shown that, for every t, all chordal graphs of clique number at most t are well-quasi-ordered by . On the other hand, if the bound on clique number is dropped, even the class of interval graphs is not well-quasi-ordered by .
A chordal graph is called restricted unimodular if each cycle of its vertex-clique incidence bipartite graph has length divisible by 4. We characterize these graphs within all chordal graphs by forbidden induced subgraphs, by minimal relative separators, and in other ways. We show how to construct t