## Abstract To __suppress__ a vertex $v$ in a finite graph __G__ means to delete it and add an edge from __a__ to __b__ if __a__, __b__ are distinct nonadjacent vertices which formed the neighborhood of $v$. Let $G--x$ be the graph obtained from $G-x$ by suppressing vertices of degree at most 2 as
Contractile Triples in 3-Connected Graphs
β Scribed by W. Mccuaig; K. Ota
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 295 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0095-8956
No coin nor oath required. For personal study only.
β¦ Synopsis
We prove that every 3-connected graph (G) of order at least nine has two adjacent edges (x y) and (y z) such that the graph obtained from (G) by contracting (x, y), and (z) into a single vertex is also 3-connected. (i) 1994 Academic Press. Inc.
π SIMILAR VOLUMES
## Abstract An edge __e__ of a 3βconnected graph __G__ is said to be __removable__ if __G__ β __e__ is a subdivision of a 3βconnected graph. If __e__ is not removable, then __e__ is said to be __nonremovable.__ In this paper, we study the distribution of removable edges in 3βconnected graphs and pr
Moon and Moser in 1963 conjectured that if G is a 3-connected planar graph on n vertices, then G contains a cycle of length at least OΓ°n log 3 2 Γ: In this paper, this conjecture is proved. In addition, the same result is proved for 3-connected graphs embeddable in the projective plane, or the torus
A subgraph H of a 3-connected finite graph G is called contractible if H is connected and G&V(H) is 2-connected. This work is concerned with a conjecture of McCuaig and Ota which states that for any given k there exists an f (k) such that any 3-connected graph on at least f (k) vertices possesses a