We present a new short combinatorial proof of the sufficiency part of the well-known Kuratowski's graph planarity criterion. The main steps are to prove that for a minor minimal non-planar graph G and any edge xy: (1) G-x-y does not contain ΞΈ-subgraph; (2) G-x-y is homeomorphic to the circle; (3)
A criterion for the planarity of a graph
β Scribed by Jerome R. Breitenbach
- Publisher
- John Wiley and Sons
- Year
- 1986
- Tongue
- English
- Weight
- 146 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
β¦ Synopsis
In a recent paper, Carsten Thomassen [Carsten Thomassen, Planarity and duality of finite and infinite graphs. J. Combinatorial Theory Ser. B 29 (1980) 244-2711 has shown that a number of criteria for the planarity of a graph can be reduced to that of Kuratowski. Here we present another criterion which, as well, is easily proved via Kuratowski's. The criterion is based on the observation that the imbedding of a graph in a plane imposes a cyclic ordering, say clockwise, on the edges incident with each vertex, and that these cyclic orderings are related.
π SIMILAR VOLUMES
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