Given a graph G, its odd set is a set of all integers k such that G has odd number of vertices of degree k. We show that if two graphs G and H of the same order have the same odd sets then they can be obtained from each other by succesive application of the following two operations: β’ add or remove
Graphs with given odd sets and the least number of vertices
β Scribed by Louis Hakimi, S.
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 64 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
β¦ Synopsis
This note presents a solution to the following problem posed by Chen, Schelp, and SoltΓ©s: find a simple graph with the least number of vertices for which only the degrees of the vertices that appear an odd number of times are given.
π SIMILAR VOLUMES
The generating function for labelled graphs in which each vertex has degree at least three is obtained by the Principle of Inclusion and Exclusion. Asymptotic and explicit values for the coefficients are calculated in the connected case. The results are extended to bipartite graphs.
This note can be treated a s a supplement to a paper written by Bollobas which was devoted to the vertices of a given degree in a random graph. We determine some values of the edge probability p for which the number of vertices of a given degree of a random graph G E ?An, p) asymptotically has a nor
The interval number of a graph G, denoted i(G), is the least positive integer t such that G is the intersection graph of sets, each of which is the union of t compact real intervals. It is known that every planar graph has interval number at most 3 and that this result is best possible. We investiga
## Abstract The odd girth of a graph __G__ is the length of a shortest odd cycle in __G__. Let __d__(__n, g__) denote the largest __k__ such that there exists a __k__βregular graph of order __n__ and odd girth __g__. It is shown that __d____n, g__ β₯ 2|__n__/__g__β₯ if __n__ β₯ 2__g__. As a consequenc
## Abstract For a vertex __v__ of a graph __G__, we denote by __d__(__v__) the __degree__ of __v__. The __local connectivity__ ΞΊ(__u, v__) of two vertices __u__ and __v__ in a graph __G__ is the maximum number of internally disjoint __u__ β__v__ paths in __G__, and the __connectivity__ of __G__ is