English

Minimum degree edge-disjoint Hamilton cycles in random directed graphs

Combinatorics 2025-02-04 v1

Abstract

In this paper we consider the problem of finding ``as many edge-disjoint Hamilton cycles as possible'' in the binomial random digraph Dn,pD_{n,p}. We show that a typical Dn,pD_{n,p} contains precisely the minimum between the minimum out- and in-degrees many edge-disjoint Hamilton cycles, given that plog15n/np\geq \log^{15} n/n, which is optimal up to a factor of polylogn\log n. Our proof provides a randomized algorithm to generate the cycles and uses a novel idea of generating Dn,pD_{n,p} in a sophisticated way that enables us to control some key properties, and on an ``online sprinkling'' idea as was introduced by Ferber and Vu.

Keywords

Cite

@article{arxiv.2502.01631,
  title  = {Minimum degree edge-disjoint Hamilton cycles in random directed graphs},
  author = {Asaf Ferber and Adva Mond},
  journal= {arXiv preprint arXiv:2502.01631},
  year   = {2025}
}
R2 v1 2026-06-28T21:31:01.424Z