A covering projection from a graph G onto a graph H is a ``local isomorphism'': a mapping from the vertex set of G onto the vertex set of H such that, for every v # V(G), the neighborhood of v is mapped bijectively onto the neighborhood (in H ) of the image of v. We investigate two concepts that con
Covering Graphs: The Covering Problem Solved
β Scribed by Yair Caro; Raphael Yuster
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 238 KB
- Volume
- 83
- Category
- Article
- ISSN
- 0097-3165
No coin nor oath required. For personal study only.
β¦ Synopsis
For every fixed graph H, we determine the H-covering number of K n , for all n>n 0 (H ). We prove that if h is the number of edges of H, and gcd(H )=d is the greatest common divisor of the degrees of H, then there exists n 0 =n 0 (H ), such that for all n>n 0 ,
Our main tool in proving this result is the deep decomposition result of Gustavsson.
π SIMILAR VOLUMES
## Abstract Covering arrays have applications in software, network and circuit testing. In this article, we consider a generalization of covering arrays that allows mixed alphabet sizes as well as a graph structure that specifies the pairwise interactions that need to be tested. Let __k__ and __n__
For a large class of finite Cayley graphs we construct covering graphs whose automorphism groups coincide with the groups of lifted automorphisms. As an application we present new examples of 1Γ2-transitive and 1-regular graphs.