English

Packing subdivisions into regular graphs

Combinatorics 2026-02-09 v2

Abstract

We show that, for any graph FF and η>0\eta>0, there exists a d0=d0(F,η)d_0=d_0(F,\eta) such that every nn-vertex dd-regular graph with dd0d \geq d_0 has a collection of vertex-disjoint FF-subdivisions covering at least (1η)n(1-\eta)n vertices. This verifies a conjecture of Verstra\"ete from 2002 and improves a recent result of Letzter, Methuku and Sudakov which additionally required dd to be at least polylogarithmic in nn.

Keywords

Cite

@article{arxiv.2508.00480,
  title  = {Packing subdivisions into regular graphs},
  author = {Richard Montgomery and Kalina Petrova and Arjun Ranganathan and Jane Tan},
  journal= {arXiv preprint arXiv:2508.00480},
  year   = {2026}
}

Comments

10 pages, 1 figure. Version accepted to appear in Proceedings of the American Mathematical Society

R2 v1 2026-07-01T04:29:10.320Z