Connectivity conjecture for the infinite Schaeffer forest

Let QQ be the infinite random quadrangulation, and let Sch(Q){\rm Sch}_\infty(Q) be the spanning forest obtained by applying the Schaeffer construction to the increments of the Busemann function hh defined by

Δh(x,y)=limzd(x,z)d(y,z)=h(x)h(y).\Delta h(x,y)=\lim_{z\to\infty}d(x,z)-d(y,z)=h(x)-h(y).

Connectivity conjecture. The graph Sch(Q){\rm Sch}_\infty(Q) is connected almost surely.

This conjecture interprets the forest seen from infinity as a single limiting Schaeffer tree. The supplied text gives no resolution, so its status remains open.

Sources & referencesView supporting material

Primary source

Maxim Krikun, “On one property of distances in the infinite random quadrangulation”, arXiv:0805.1907 (2008).

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