The connectivity conjecture for the crossing graph of random right-angled Coxeter groups

Let Γ\Gamma be a random graph in G(n,p)\mathcal{G}(n,p), and let (Γ)\square(\Gamma) denote the graph whose vertices are induced Morse 44-cycles of Γ\Gamma, with adjacency determined by the crossing relation.

Connectivity conjecture. For every ϵ>0\epsilon>0, if

A+(()n)>(1+ϵ)lognn,{{\overline A}^{+}({(})}n)>(1+\epsilon)\sqrt{\frac{\log n}{n}},

then, asymptotically almost surely, (Γ)\square(\Gamma) is connected.

This conjecture identifies the proposed sharp threshold for connectedness of (Γ)\square(\Gamma), complementing the result that below the corresponding lower threshold (Γ)\square(\Gamma) has an isolated vertex. The source does not provide a resolution of the conjecture.

Sources & referencesView supporting material

Primary source

Tim Susse, “Morse subgroups and boundaries of random right-angled Coxeter groups”, arXiv:2108.09824 (2021).

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