Chromatic number conjecture for powers of random graphs

From papers

Let Gn,pG_{n,p} be the random graph on nn vertices, let Gn,prG_{n,p}^r denote its rrth power, and write χ(G)\chi(G) and α(G)\alpha(G) for the chromatic and independence numbers of a graph GG, respectively. Writing ω(G)\omega(G) for its clique number, let p=d/np=d/n, where d>0d>0 is a constant and let r1r\geq 1 be a fixed positive integer. Chromatic number conjecture. With high probability,

χ(Gn,pr)=Θ(max{ω(Gn,pr),nα(Gn,pr)}).\chi(G_{n,p}^r)=\Theta\left(\max\left\{\omega(G_{n,p}^r),\frac{n}{\alpha(G_{n,p}^r)}\right\}\right).

The conjecture proposes that the chromatic number of a fixed power of a sparse random graph is determined, up to constant factors, by the larger of its clique-number lower bound and the lower bound obtained from its independence number. The preceding results identify distinct regimes in which chromatic number appears to be locally or globally determined; the conjectured equivalence remains open.

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Sources & referencesView supporting material

Primary source

Alan Frieze, Ross Kang, Aditya Raut, Michelle Sweering and Hilde Verbeek, “Coloring powers of random graphs”, arXiv:2604.14006 (2026).

Additional references

11 papers in this index state this conjecture (2010–2026). The statement above is taken from the most recent of them; the others are arXiv:2310.18163, arXiv:2109.00737, arXiv:2104.14172, arXiv:2010.00229, arXiv:1709.05904, arXiv:1704.07052, arXiv:1606.08532, arXiv:1408.4065, arXiv:1107.1920, arXiv:1002.0190.

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