## Abstract An __m__โ__covering__ of a graph __G__ is a spanning subgraph of __G__ with maximum degree at most __m__. In this paper, we shall show that every 3โconnected graph on a surface with Euler genus __k__โโฅโ2 with sufficiently large representativity has a 2โconnected 7โcovering with at most
2-connected coverings of bounded degree in 3-connected graphs
โ Scribed by Zhicheng Gao
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 572 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
In a recent paper, Barnette showed that every 3โconnected planar graph has a 2โconnected spanning subgraph of maximum degree at most fifteen, he also constructed a planar triangulation that does not have 2โconnected spanning subgraphs of maximum degree five. In this paper, we show that every 3โconnected graph which is embeddable in the sphere, the projective plane, the torus or the Klein bottle has a 2โconnected spanning subgraph of maximum degree at most six. ยฉ 1995 John Wiley & Sons, Inc.
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## Abstract Let __C__ be a longest cycle in the 3โconnected graph __G__ and let __H__ be a component of __G__โโโ__V__(__C__) such that |__V__(__H__)|โโฅโ3. We supply estimates of the form |__C__|โโฅโ2__d__(__u__)โ+โ2__d__(__v__)โโโฮฑ(4โโคโฮฑโโคโ8), where __u__,__v__ are suitably chosen nonโadjacent verti
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