## Abstract In 1983, the second author [D. Marušič, Ars Combinatoria 16B (1983), 297–302] asked for which positive integers __n__ there exists a non‐Cayley vertex‐transitive graph on __n__ vertices. (The term __non‐Cayley numbers__ has later been given to such integers.) Motivated by this problem,
Large Cayley graphs and vertex-transitive non-Cayley graphs of given degree and diameter
✍ Scribed by Heather Macbeth; Jana Šiagiová; Jozef Širáň; Tomáš Vetrík
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 128 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0364-9024
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✦ Synopsis
Abstract
For any d⩾5 and k⩾3 we construct a family of Cayley graphs of degree d, diameter k, and order at least k((d−3)/3)^k^. By comparison with other available results in this area we show that our family gives the largest currently known Cayley graphs for a wide range of sufficiently large degrees and diameters. © 2009 Wiley Periodicals, Inc. J Graph Theory 64: 87–98, 2010
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