## Abstract A lower bound is established on the number of edges in a maximum __k__‐colorable subgraph of a loopless graph __G__. For the special case of 3‐regular graphs, lower bounds are also determined on the maximum number of edges in a bipartite subgraph whose color classes are of equal size.
On maximum bipartite subgraphs
✍ Scribed by Günther Malle
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 314 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
In this paper are investigated maximum bipartite subgraphs of graphs, i.e., bipartite subgraphs with a maximum number of edges. Such subgraphs are characterized and a criterion is given for a subgraph to be a unique maximum bipartite subgraph of a given graph. In particular maximum bipartite subgraphs of cubic graphs are investigated. It is shown that cubic graphs can be built up from five building stones (called elementary paths). Finally the investigation of a special class of cubic graphs yields a theorem which characterizes the Petersen graph and the dodecahedron graph by means of their maximum bipartite subgraphs.
📜 SIMILAR VOLUMES
## Abstract Lower bounds on the size of a maximum bipartite subgraph of a triangle‐free __r__‐regular graph are presented.
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## Abstract A cubic triangle‐free graph has a bipartite subgraph with at least 4/5 of the original edges. Examples show that this is a best possible result.