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- W2064986980 abstract "We consider a dynamical variant of Dvoretzky’s classical covering problem of the unit circumference circle, where the centers of the arcs are updated according to independent Poisson processes of unit intensity. This dynamical model was introduced (in greater generality) in Jonasson and Steif [Jonasson, J., Steif, J., 2008. Dynamical models for circle covering: Brownian motion and Poisson updating. Ann. Probab. 36, 739–764], where is was shown that when the length of the n’th arc is ℓn and we write un≔∏k=1n(1−ℓk), then lim infnn(logn)un<∞ implies that the whole circle is a.s. covered at all times, whereas if ∑neℓ1+⋯+ℓn/(n2logn)<∞, then a.s. there are times at which the circle is not fully covered. In this paper we modify the former condition to lim supnnun<∞. In particular this takes care of the natural border case ℓn=1/n; no exceptional times exist. More generally, with the parametrization ℓn=c/n, there is no c for which there are exceptional times for which the model behaves differently than for the static case." @default.
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- W2064986980 date "2008-10-01" @default.
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- W2064986980 title "Dynamical circle covering with homogeneous Poisson updating" @default.
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- W2064986980 doi "https://doi.org/10.1016/j.spl.2008.03.001" @default.
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