English

Finding tight Hamilton cycles in random hypergraphs faster

Combinatorics 2021-07-01 v1

Abstract

In an rr-uniform hypergraph on nn vertices a tight Hamilton cycle consists of nn edges such that there exists a cyclic ordering of the vertices where the edges correspond to consecutive segments of rr vertices. We provide a first deterministic polynomial time algorithm, which finds a.a.s. tight Hamilton cycles in random rr-uniform hypergraphs with edge probability at least Clog3n/nC \log^3n/n. Our result partially answers a question of Dudek and Frieze [Random Structures & Algorithms 42 (2013), 374-385] who proved that tight Hamilton cycles exists already for p=ω(1/n)p=\omega(1/n) for r=3r=3 and p=(e+o(1))/np=(e + o(1))/n for r4r\ge 4 using a second moment argument. Moreover our algorithm is superior to previous results of Allen, B\"ottcher, Kohayakawa and Person [Random Structures & Algorithms 46 (2015), 446-465] and Nenadov and \v{S}kori\'c [arXiv:1601.04034] in various ways: the algorithm of Allen et al. is a randomised polynomial time algorithm working for edge probabilities pn1+εp\ge n^{-1+\varepsilon}, while the algorithm of Nenadov and \v{S}kori\'c is a randomised quasipolynomial time algorithm working for edge probabilities pClog8n/np\ge C\log^8n/n.

Keywords

Cite

@article{arxiv.1710.08988,
  title  = {Finding tight Hamilton cycles in random hypergraphs faster},
  author = {Peter Allen and Christoph Koch and Olaf Parczyk and Yury Person},
  journal= {arXiv preprint arXiv:1710.08988},
  year   = {2021}
}

Comments

17 pages

R2 v1 2026-06-22T22:24:42.217Z