English

Minimum degree ensuring that a hypergraph is hamiltonian-connected

Combinatorics 2023-07-17 v3

Abstract

A hypergraph HH is hamiltonian-connected if for any distinct vertices xx and yy, HH contains a hamiltonian Berge path from xx to yy. We find for all 3r<n3\leq r<n, exact lower bounds on minimum degree δ(n,r)\delta(n,r) of an nn-vertex rr-uniform hypergraph HH guaranteeing that HH is hamiltonian-connected. It turns out that for 3n/2<r<n3\leq n/2<r<n, δ(n,r)\delta(n,r) is 1 less than the degree bound guaranteeing the existence of a hamiltonian Berge cycle. Moreover, unlike for graphs, for each r3r \geq 3 there exists an rr-uniform hypergraph that is hamiltonian-connected but does not contain a hamiltonian Berge cycle.

Keywords

Cite

@article{arxiv.2207.14794,
  title  = {Minimum degree ensuring that a hypergraph is hamiltonian-connected},
  author = {Alexandr Kostochka and Ruth Luo and Grace McCourt},
  journal= {arXiv preprint arXiv:2207.14794},
  year   = {2023}
}

Comments

22 pages, 1 figure. Final version to appear in the European Journal of Combinatorics

R2 v1 2026-06-25T01:20:20.527Z