English

A note on the chromatic number of the square of a sparse random graph

Combinatorics 2025-02-12 v6

Abstract

We show that w.h.p the list chromatic number χ\chi_\ell of the square of Gn,pG_{n,p} for p=c/np=c/n is asymptotically equal to the maximum degree Δ(Gn,p)\Delta(G_{n,p}). Since χ(Gn,p2)χ(Gn,p2)\chi(G^2_{n,p})\leq \chi_\ell(G^2_{n,p}), this also improves an earlier result of Garapaty et al \cite{KLMP} who proved that χ(Gn,p2)6Δ(Gn,p)\chi(G^2_{n,p}) \leq 6 \cdot \Delta(G_{n,p}) w.h.p.

Keywords

Cite

@article{arxiv.2312.03563,
  title  = {A note on the chromatic number of the square of a sparse random graph},
  author = {Alan Frieze and Aditya Raut},
  journal= {arXiv preprint arXiv:2312.03563},
  year   = {2025}
}