English

Embedding trees using minimum and maximum degree conditions

Combinatorics 2025-12-19 v1

Abstract

A variant of the Erd\H{o}s-S\'os conjecture, posed by Havet, Reed, Stein and Wood, states that every graph with minimum degree at least 2k/3\lfloor 2k/3 \rfloor and maximum degree at least kk contains a copy of every tree with kk edges. Both degree bounds are best possible. We confirm this conjecture for large trees with bounded maximum degree, by proving that for all ΔN\Delta\in \mathbb{N} and sufficiently large kNk\in \mathbb{N}, every graph GG with δ(G)2k/3\delta(G)\geq \lfloor 2k/3 \rfloor and Δ(G)k\Delta(G)\geq k contains a copy of every tree TT with kk edges and Δ(T)Δ\Delta(T)\leq \Delta. We also prove similar results where alternative degree conditions are considered. For the same class of trees, this verifies exactly a related conjecture of Besomi, Pavez-Sign\'e and Stein, and provides asymptotic confirmations of two others.

Keywords

Cite

@article{arxiv.2512.16799,
  title  = {Embedding trees using minimum and maximum degree conditions},
  author = {Alexey Pokrovskiy and Leo Versteegen and Ella Williams},
  journal= {arXiv preprint arXiv:2512.16799},
  year   = {2025}
}

Comments

44 pages, 4 figures

R2 v1 2026-07-01T08:31:57.608Z