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Small worlds: The structure of social networks

M. E. J. Newman

posted on 01 January 2000

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It has been found by experiment that any two people in the world, chosen at random, are connected to one another by a short chain of intermediate acquaintances, of typical length 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.