Loose Hamilton Cycles in Random Uniform Hypergraphs

preprint2011arXivOpen access

Abstract

In the random hypergraph Hn,p;kH_{n,p;k} each possible kk-tuple appears independently with probability pp. A loose Hamilton cycle is a cycle in which every pair of adjacent edges intersects in a single vertex. We prove that if pnk−1/log⁡np n^{k-1}/\log n tends to infinity with nn then lim⁡n→∞2(k−1)∣nPr⁡(Hn,p;k contains a loose Hamilton cycle)=1.\lim_{\substack{n\to \infty 2(k-1) |n}}\Pr(H_{n,p;k}\ contains\ a\ loose\ Hamilton\ cycle)=1. This is asymptotically best possible.

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