## Abstract Let __G__ be a graph drawn in the plane so that its edges are represented by __x__‐monotone curves, any pair of which cross an even number of times. We show that __G__ can be redrawn in such a way that the __x__‐coordinates of the vertices remain unchanged and the edges become non‐cross
-constructibility of planar graphs
✍ Scribed by C. M. Mynhardt; I. Broere
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 386 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0364-9024
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✦ Synopsis
Abstract
In this paper, the concept of the 𝒢‐constructibility of graphs is introduced and investigated with particular reference to planar graphs. It is conjectured that the planar graphs are minimally N‐constructible, where N is a finite set of graphs and an infinite set 𝒢 is obtained such that the planar graphs are also minimally 𝒢‐constructible. Finally, some properties of the set of all N‐constructible graphs are discussed and compared with the corresponding properties of planar graphs.
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