How PageRank works (24 Sep 2004)
1. Google’s PageRank algorithm is a mathematical recipe that uses the structure of the links between web pages to assign a score to each page that reflects its importance. In effect, each link from one page to another is counted as a “vote” for the destination page, and each page’s score depends on the scores of the pages that link to it. But those pages’ scores, in turn, depend on the scores of the pages that link to them, and so on. As a result, calculating the scores is a complicated business.
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