English

Co-degrees resilience for perfect matchings in random hypergraphs

Combinatorics 2020-02-11 v2

Abstract

In this paper we prove an optimal co-degrees resilience property for the binomial kk-uniform hypergraph model Hn,pkH_{n,p}^k with respect to perfect matchings. That is, for a sufficiently large nn which is divisible by kk, and pCklogn/np\geq C_k\log_n/n, we prove that with high probability every subgraph HHn,pkH\subseteq H^k_{n,p} with minimum co-degree (meaning, the number of supersets every set of size k1k-1 is contained in) at least (1/2+o(1))np(1/2+o(1))np contains a perfect matching.

Keywords

Cite

@article{arxiv.1908.01435,
  title  = {Co-degrees resilience for perfect matchings in random hypergraphs},
  author = {Asaf Ferber and Lior Hirschfeld},
  journal= {arXiv preprint arXiv:1908.01435},
  year   = {2020}
}
R2 v1 2026-06-23T10:39:25.047Z