A subgraph H of a graph G is called a star-subgraph if each component of H is a star. The star-arboricify of G, denoted by sa(G), is the minimum number of star-subgraphs that partition the edges of G. In this paper we show that sa(G) is [r/21 + 1 or [r/2] + 2 for the complete r-regular multipartite
The linear arboricity of some regular graphs
✍ Scribed by Hikoe Enomoto; Bernard Péroche
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- English
- Weight
- 582 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
✦ Synopsis
W e prove that the linear arboricity of every 5-regular graph is 3. That is, the edges of any 5-regular graph are covered by three linear forests. W e also determine the linear arboricity of 6-regular graphs and 8-regular graphs. These results improve the known upper bounds for the linear arboricity of graphs with given maximum degree.
📜 SIMILAR VOLUMES
The linear arboricity la(G) of a graph G is the minimum number of linear forests that partition the edges of G. Akiyama, Exoo, and Harary conjectured for any simple graph G with maximum degree ∆. The conjecture has been proved to be true for graphs having ∆ =
Bermond et al. [2] conjectured that the edge set of a cubic graph G can be partitioned into two k-linear forests, that is to say two forests whose connected components are paths of length at most k, for all k >/5. We shall prove a weaker result that the statement is valid for all k/> 18. All graphs
## Abstract The linear vertex‐arboricity ρ(__G__) of a graph __G__ is defined to be the minimum number of subsets into which the vertex set of __G__ can be partitioned such that each subset induces a linear forest. In this paper, we give the sharp upper and lower bounds for the sum and product of l
The point-linear arboricity of a graph G = (V, E), written as p,(G), is defined as p,(G) =min{k / there exists a partition of V into k subsets, V =LJt, V,, such that (V,) is a linear forest for 1 <i <k}. In this paper, we will discuss the point-linear arboricity of planar graphs and obtained follow