The Math Behind PageRank

anaesthetica writes "The American Mathematical Society is featuring an article with an in-depth explanation of the type of mathematical operations that power PageRank. Because about 95% of the text on the 25 billion pages indexed by Google consist of the same 10,000 words, determining relevance requires an extremely sophisticated set of methods. And because the links constituting the web are constantly changing and updating, the relevance of pages needs to be recalculated on a continuous basis."

10,000 words

[ambivalentduck]

But 9,000 of those words are slang for parts of the human anatomy.  Go figure.

Re:Bad summary

[The Zon]

Even though Google uses some clever numerics to calculate the eigenvectors to a 25 billion by 25 billion matrix by iteration, it still takes several hours to finish.

Please. I can do that on paper in, like, five minutes.

Pagerank

[Skythe]

Because about 95% of the text on the 25 billion pages indexed by Google consist of the same 10,000 words, determining relevance requires an extremely sophisticated set of methods.

They use a set of nested if-else statements
*ducks*

Here it is... Google's PageRank formula

[Reverend99]

SELECT advertiser, description, link, adcost
FROM tblAdvertisers
WHERE adword LIKE %searchstring%
ORDER BY adcost

you forgot..

[gfody]

ORDER BY adcost DESC

Re:PageRank doesn't seem to be based on keywords

[kimvette]

You got the link wrong. Here is the correct URL. [google.com]

Only three articles about Google on one page?

[colourmyeyes]

I think we can get four or five tomorrow.

Re:Does PageRank count?

[Anonymous Coward]

Concentrate on SERPs, not PR, ASAP for SEO on the WWW

I searched on Google but I cannot find what "on", "not", "for" and "the" mean...