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 ∆ =
On point-linear arboricity of planar graphs
✍ Scribed by Jianfang Wang
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 220 KB
- Volume
- 72
- Category
- Article
- ISSN
- 0012-365X
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✦ Synopsis
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 following results: p,,(G) = 2 if G is a outplanar graph. p,,(G) = 4 if G is a planar graph.
📜 SIMILAR VOLUMES
## Abstract We prove in this note that the linear vertex‐arboricity of any planar graph is at most three, which confirms a conjecture due to Broere and Mynhardt, and others.
## Abstract In this paper, we study the critical point‐arboricity graphs. We prove two lower bounds for the number of edges of __k__‐critical point‐arboricity graphs. A theorem of Kronk is extended by proving that the point‐arboricity of a graph __G__ embedded on a surface __S__ with Euler genus __
## 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
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 arboricity of a graph __G__ is the minimum number of linear forests which partition the edges of __G__. Akiyama et al. conjectured that $\lceil {\Delta {({G})}\over {2}}\rceil \leq {la}({G}) \leq \lceil {\Delta({G})+{1}\over {2}}\rceil$ for any simple graph __G__. Wu wu prove