Toughness and vertex degrees

Bauer, D., Broersma, H. J., van den Heuvel, J. ORCID: 0000-0003-0897-9148, Kahl, N. and Schmeichel, E. (2013) Toughness and vertex degrees. Journal of Graph Theory, 72 (2). pp. 209-219. ISSN 0364-9024

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Abstract

We study theorems giving sufficient conditions on the vertex degrees of a graph $G$ to guarantee $G$ is $t$-tough. We first give a best monotone theorem when $t\ge1$, but then show that for any integer $k\ge1$, a best monotone theorem for $t=\frac1k\le 1$ requires at least $f(k)\cdot|V(G)|$ nonredundant conditions, where $f(k)$ grows superpolynomially as $k\rightarrow\infty$. When $t<1$, we give an additional, simple theorem for $G$ to be $t$-tough, in terms of its vertex degrees.

Item Type:	Article
Official URL:	http://onlinelibrary.wiley.com/
Additional Information:	© 2013 John Wiley & Sons, Inc.
Divisions:	Mathematics
Subjects:	Q Science > QA Mathematics
Date Deposited:	09 Apr 2010 13:16
Last Modified:	14 Sep 2024 05:36
Projects:	EP/F064551/1
Funders:	Engineering and Physical Sciences Research Council
URI:	http://eprints.lse.ac.uk/id/eprint/27680

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