Experimentally it has been found that any two people in the world, chosen at random, are connected to one another by a short chain of intermediate acquaintances, of typical lenth about six. This phenomenon, colloquially referred to as the "six degrees of separation", has been the subject of a considerable amount of recent research and modeling, which we review here.
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Paper provided by Santa Fe Institute in its series Working Papers with number
99-12-080.
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