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arXiv · 2603.03076

Concentration of the largest induced tree size of $G_{n,p}$ around the standard expectation threshold

Jakob Hofstad
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Abstract

Let $T(G)$ be the size of the largest induced tree of $G$, and let $G_{n,p}$ be the binomial random graph. Kamaldinov, Skorkin, and Zhukovskii proved that $T(G_{n,p})$ equals one of two consecutive values with high probability if $p$ is constant, and more recently, Oropeza extended this result to include all vanishing $p$ such that $p > n^{-\frac{e-2}{3e-2} + \epsilon}$, where $e$ is Euler's constant. We further extend this result to all vanishing $p$ such that $p \gg n^{-1/2} \ln^{3/2} n$, and furthermore, we show that, for $p$ such that $n^{-1} \ll p \ll n^{-1/2}, \ T(G_{n,p})$ cannot be concentrated at the standard expectation threshold.

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Jakob Hofstad. 2026-03-03. Concentration of the largest induced tree size of $G_{n,p}$ around the standard expectation threshold. https://arxiv.org/abs/2603.03076

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