Recognition of Circle Graphs
✍ Scribed by J. Spinrad
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 736 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0196-6774
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✦ Synopsis
This paper presents a new algorithm for recognizing circle graphs, combining ideas from an earlier circle graph recognition algorithm due to Gabor, Hsu, and Supowit and an algorithm to determine whether a graph can be decomposed by the split decomposition. The result is an (O\left(n^{2}\right)) algorithm for placing chords on the circle when the split decomposition is known. When combined with the result of the companion paper, this gives an (O\left(n^{2}\right)) algorithm for circle graph recognition. (1) 1994 Academic Press, Inc.
📜 SIMILAR VOLUMES
A property of unimodularity is introduced for antisymmetric integral matrices. It is satisfied by the adjacency matrix of a circle graph provided with a Naji orientation . In a further paper we shall interprete this result in terms of symmetric matroids introduced in . In this communication we give
## Abstract A circle graph is the intersection graph of a set of chords of a circle. The class of circle graphs is closed under pivot‐minors. We determine the pivot‐minor‐minimal non‐circle‐graphs; there are 15 obstructions. These obstructions are found, by computer search, as a corollary to Bouche
## Abstract We prove that, for a fixed bipartite circle graph __H__, all line graphs with sufficiently large rank‐width (or clique‐width) must have a pivot‐minor isomorphic to __H__. To prove this, we introduce graphic delta‐matroids. Graphic delta‐matroids are minors of delta‐matroids of line grap
For any fixed integer k G 2, define the class of k-polygon graphs as the intersection graphs of chords inside a convex k-polygon, where the endpoints of each chord lie on two different sides. The case where k s 2 is degenerate; for our purpose, we view any pair of parallel lines as a 2-polygon. Henc