## Abstract Necessary and sufficient conditions are given for a nonplanar graph to have a line graph with crossing number one. This corrects some errors in Kulli et al. 4. © 2001 John Wiley & Sons, Inc. J Graph Theory 37: 181–188, 2001
Jump-number of Means on Graphs
✍ Scribed by Christian Delhommé; Maurice Pouzet; Norbert Sauer
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 153 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0195-6698
No coin nor oath required. For personal study only.
✦ Synopsis
We prove that the jump-number of a symmetric and idempotent n-ary operation defined on the vertex-set of a graph G is at least min g 4 , g-1 n
, where g is the girth of G.
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