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The Ramsey community number as a renormalization-group crossing

Vazquez, Alexei
arXiv (OAI Expanded) · Papers
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combinatoricsphysics-and-societystatistical-mechanics
The Ramsey community number $r_k$ is the smallest size at which a network is better described by communities than by none, under a Bayesian detection rule. On the diamond hierarchical lattice we show that $r_k$ is an exact renormalization-group crossing: the block-model sufficient statistics obey a
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