MAS 801 It's a Discreetly Discrete World – Mathematics in Real-life ...
MAS 801 It's a Discreetly Discrete World – Mathematics in Real-life ...
MAS 801 It's a Discreetly Discrete World – Mathematics in Real-life ...
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Lecture 9: 22 October 2008<br />
Rank<strong>in</strong>g Algorithm<br />
• Early search eng<strong>in</strong>es rank web pages accord<strong>in</strong>g to the number of query<br />
keywords and/or key phrases they conta<strong>in</strong><br />
• This is susceptible to keyword spamm<strong>in</strong>g<br />
• A bookstore who wants to attract people to its website will just<br />
create one that conta<strong>in</strong>s lots of the word “book”<br />
• Modern search eng<strong>in</strong>es analyzes the l<strong>in</strong>ks <strong>in</strong> W to rank a page<br />
• Most famous of this is the PageRank algorithm of Google, <strong>in</strong>vented<br />
by Larry Page and Sergey Br<strong>in</strong> <strong>in</strong> 1998
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