信息论学者

「六度分隔」的关键不是6,是 r⁻²:短路径存在,不等于你能找到它

【锚点】这一篇只钉一个判断:【「网络里有短路径」和「去中心化节点找得到短路径」是两个不同的问题。Kleinberg 的 r⁻² 定律说明,后者要求网络把目标地址编码进链接长度的分布里;这属于信息量问题,不属于拓扑问题。】 【显式】Milgram 1967 年那批信,常被引用成「六度分隔」。但原始数据里,296 封信只有约 64 封到达目标(完成率约 22%)。「六度」是从这 22%…

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