Lin, Y. and Noble, Steven and Jin, X. and Cheng, W. (2012) On plane graphs with link component number equal to the nullity. Discrete Applied Mathematics 160 (9), pp. 1369-1375. ISSN 0166-218X.
Abstract
In this paper, we study connected plane graphs with link component number equal to the nullity and call them near-extremal graphs. We first study near-extremal graphs with minimum degree at least 3 and prove that a connected plane graph with minimum degree at least 3 is a near-extremal graph if and only if is isomorphic to , the complete graph with 4 vertices. The result is obtained by studying general graphs using the knowledge of bicycle space and the Tutte polynomial. Then a simple algorithm is given to judge whether a connected plane graph is a near-extremal graph or not. Finally we study the construction of near-extremal graphs and prove that all near-extremal graphs can be constructed from a loop and by two graph operations.
Metadata
| Item Type: | Article |
|---|---|
| School: | Birkbeck Faculties and Schools > Faculty of Science > School of Computing and Mathematical Sciences |
| Depositing User: | Administrator |
| Date Deposited: | 06 Jan 2023 14:19 |
| Last Modified: | 09 Aug 2023 12:54 |
| URI: | https://eprints.bbk.ac.uk/id/eprint/50372 |
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