The Shields-Harary indices of vulnerability of a graph
β Scribed by F. Harary; P.D. Johnson Jr.
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 657 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0895-7177
No coin nor oath required. For personal study only.
β¦ Synopsis
In 1972 the late Allen Shields posed a striking conjecture, eventually confirmed by Schanuel [1], about finite sequences of positive numbers. Shields and the first author saw that the conjectured result gave the answer for paths to a question that could be asked about any graph. That realization has now germinated and produced a family of graph parameters that measure certain kinds of fortifiability of graphs, viewed as networks of storage fortresses. We discuss that family of parameters. (~) 2001 Elsevier Science Ltd. All rights reserved.
π SIMILAR VOLUMES
## Defining set The defining number The strong defining number Harary graph a b s t r a c t In a given graph G = (V , E), a set of vertices S with an assignment of colors to them is said to be a defining set of the vertex coloring of G if there exists a unique extension of the colors of S to a c
A Multigraph His irregular if no two of its nodeahavethe samedegree.It hasbeen shownthat a graphis the underlying graphof some irregularMultigraph if and only if it has at most one trivialcomponentand no componentsof order2. We definethe irregularity cost of such a graph G to be the minimumnumberof
## Abstract The biparticity Ξ²(__G__) of a graph __G__ is the minimum number of bipartite graphs required to cover __G__. It is proved that for any graph __G__, Ξ²(__G__) = {log~2~Ο(__G__)}. In view of the recent announcement of the Four Color Theorem, it follows that the biparticity of every planar