Small-ball asymptotic conjecture for line visibility in the hyperbolic plane

Fix a point oH2o\in\mathbb{H}^2. For each r>0r>0, let prp_r be the least p[0,1]p\in[0,1] such that every random closed set ZH2\mathcal Z\subset\mathbb{H}^2 with isometry-invariant law and

P[B(o,r)Z]>p\mathbf{P}[B(o,r)\subset\mathcal Z]>p

has positive probability of containing a hyperbolic line. Theorem~ implies that pr<1p_r<1 for every r>0r>0. Small-ball asymptotic conjecture.

lim supr01prr<.\limsup_{r\searrow 0}\frac{1-p_r}{r}<\infty.

This asks for a linear upper bound on the deficit 1pr1-p_r as the ball radius tends to zero, quantifying the high-probability condition needed for line visibility.

Sources & referencesView supporting material

Primary source

Itai Benjamini, Johan Jonasson, Oded Schramm and Johan Tykesson, “Visibility to infinity in the hyperbolic plane, despite obstacles”, arXiv:0807.3308 (2008).

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