For a pair of integers 1 F ␥r, the ␥-chromatic number of an r-uniform Ž . hypergraph H s V, E is the minimal k, for which there exists a partition of V into subsets < < T, . . . , T such that e l T F ␥ for every e g E. In this paper we determine the asymptotic 1 k i Ž . behavior of the ␥-chromatic n
On testing the ‘pseudo-randomness’ of a hypergraph
✍ Scribed by Julie Haviland; Andrew Thomason
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 405 KB
- Volume
- 103
- Category
- Article
- ISSN
- 0012-365X
No coin nor oath required. For personal study only.
✦ Synopsis
Haviland, J. and A. Thomason, On testing the 'pseudo-randomness' of a hypergraph, Discrete Mathematics 103 (1992) 321-327. By Haviland and Thomason (1989) a definition for a pseudo-random hypergraph was proposed, and the resemblance between these pseudo-random hypergraphs and random hypergraphs was explored.
Moreover, a sufficient condition was given for a hypergraph to be pseudo-random according to this definition.
Here we show that a weaker condition suffices, and give a short proof. We also report a number of examples which show that the resemblance of pseudorandom hypergraphs to random hypergraphs is much less marked than the analogous comparison in the case of graphs. The examples are easily verified by means of the theorem presented here.
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