Peck, G.W. and A. Shastri, Bandwidth of theta graphs with short paths, Discrete Mathematics 103 (1992) 177-187. The bandwidth problem for a graph is that of labelling its vertices with distinct integers so that the maximum difference across an edge is minimized. We here solve this problem for all
The edge-bandwidth of theta graphs
β Scribed by Dennis Eichhorn; Dhruv Mubayi; Kevin O'Bryant; Douglas B. West
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 129 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
β¦ Synopsis
An edge-labeling f of a graph G is an injection from E(G) to the set of integers. The edge-bandwidth of G is B H (G) min f {B H (f )}, where B H (f ) is the maximum difference between labels of incident edges of G. The theta graph Γ(l 1 , F F F ,l m ) is the graph consisting of m pairwise internally disjoint paths with common endpoints and lengths l 1 Γ Γ Γ l m . We determine the edge-bandwidth of all theta graphs.
π SIMILAR VOLUMES
The generalized theta graph G s1, ..., sk consists of a pair of endvertices joined by k internally disjoint paths of lengths s 1 , ..., s k \ 1. We prove that the roots of the chromatic polynomial p(G s1, ..., sk , z) of a k-ary generalized theta graph all lie in the disc |z -1| [ [1+o(1)] k/log k,
For a given graph G and vertices u, v in G let ,,,~ ~(.,~) G(-,,o) G~, o) denote the graph Gm ~ Va , ~s :, obtained from G by merging vertices u, v, adding edge (u, v), subdividing edge (u, v), contracting edge (u, v) of G, respectively. We give upper and lower bounds for the bandwidth of ~'~ ~(~'~)
## Abstract If a graph __G__ on __n__ vertices contains a Hamiltonian path, then __G__ is reconstructible from its edgeβdeleted subgraphs for __n__ sufficiently large.
The relationship between the graphical invariants bandwidth and number of edges is considered. Bounds, some sharp and others improvements of known results, are given for the nznber of edges of graphs having a given bandwidth. An important invariant of undirected graphs having no loops or multiple e