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Notes on the binding numbers for (a, b, k)-critical graphs

Published online by Cambridge University Press:  17 April 2009

Sizhong Zhou  and
Jiashang Jiang
Sizhong Zhou
Affiliation:
School of Mathematics and Physics, Jiangsu University of Science and Technology, Mengxi Road 2, Zhenjiang, Jiangsu 212003People's Republic of China e-mail address: zsz-cumt@163.com
Jiashang Jiang
Affiliation:
School of Mathematics and Physics, Jiangsu University of Science and Technology, Mengxi Road 2, Zhenjiang, Jiangsu 212003People's Republic of China e-mail address: zsz-cumt@163.com
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Let G be a graph of order n, and let a, b, k be nonnegative integers with 1 ≤ a < b. An [a, b]-factor of graph G is defined as a spanning subgraph F of G such that a ≤ dF(x) ≤ b for each x ϵ V (F). Then a graph G is called an (a, b, k)-critical graph if after deleting any k vertices of G the remaining graph of G has an [a, b]-factor. In this paper, it is proved that G is an (a, b, k)-critical graph if the binding number and

Furthermore, it is showed that the result in this paper is best possible in some sense.

Type
Research Article
Information
Bulletin of the Australian Mathematical Society , Volume 76 , Issue 2 , October 2007 , pp. 307 - 314
Copyright
Copyright © Australian Mathematical Society 2007

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