Determine the sharp constant in the Erdős–Rényi Lovász-number asymptotic

Determine the correct leading constant in the asymptotic behavior of the expected Lovász number for the Erdős–Rényi random graph G(n,p) in the regime \(\log^6 n/n \leq p \leq 1/2\), where the known order is \(\Theta(\sqrt{n/p})\).

Background

The paper reviews prior results on the Lovász number of Erdős–Rényi random graphs. Juhász established that the expected Lovász number has order Θ(n/p)\Theta(\sqrt{n/p}) when log6n/np1/2\log^6 n/n \leq p \leq 1/2, while subsequent work addressed concentration around the median in dense and sparse regimes. Although the order of growth is known, the precise multiplicative constant is unresolved according to the paper.

References

To the best of our knowledge, determining the correct constant in the \Theta(\sqrt{n/p}) asymptotic remains an open question.

The Lovász number of random circulant graphs  (2502.16227 - Bandeira et al., 22 Feb 2025) in Section 1, Introduction