It was recently reported that, on the average, only 19 clicks are necessary to move from any page on
the World Wide Web to any other page. That is, if the pages on the web are viewed as nodes in a
graph, then the average path length between arbitrary pairs of nodes in the graph is 19.
据报道,在平均水平上,只有19次点击是必要的,从万维网的任何一页到任何其他页面。也就是说,如果在网络上的网页被看作是在一个图中的节点,然后在图中的任意对节点之间的平均路径长度为19。
given a graph in which all nodes can be