The graph G has constant link L if for each vertex x of. G the graph induced by G on the, vertices adjacent to x is isomorphic to L. For each graph L on 6 or fewer vertices w e decide whether or not there exists a graph G with constant link L. From this w e are able to list all graphs on 11 or fewer
Up-embeddability of graphs with small order
β Scribed by Shengxiang Lv; Yanpei Liu
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 528 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0893-9659
No coin nor oath required. For personal study only.
β¦ Synopsis
Let G be a 2-edge connected simple graph with girth g and minimal degree Ξ΄ β₯ 3. If one of the following conditions is satisfied:
Here, M(Ξ΄, g) is the Moore bound of the (Ξ΄, g)-cage. As a corollary, there exists a constant c such that when Ξ΄ > r |V (G)|-6 c + 1 (r = g-1 2), G is up-embeddable.
π SIMILAR VOLUMES
It is shown that for every positive integer h, and for every > 0, there are graphs H = (V H , E H ) with at least h vertices and with density at least 0.5with the following property: any graph with minimum degree at least |V G | 2 (1 + o(1)) and |E H | divides |E G |, then G has an H-decomposition.
The graphs with exactly one, two or three independent edges are determined.
Let Ex(n, k, Β΅) denote the maximum number of edges of an n-vertex graph in which every subgraph of k vertices has at most Β΅ edges. Here we summarize some known results of the problem of determining Ex(n, k, Β΅), give simple proofs, and find some new estimates and extremal graphs. Besides proving new
We consider the maximum number of vertices in a cubic graph with small diameter. We show that a cubic graph of diameter 4 has at most 40 vertices. (The Moore bound is 46 and graphs with 38 vertices are known.) We also consider bipartite cubic graphs of diameter 5, for which the Moore bound is 62. We