Linear Algebra And Google's PageRank

The American Mathematical Society has a good article, How Google Finds Your Needle in the Web's Haystack, which explains how Google ranks the importance of each web page. There's lots of linear algebra, but its fairly accesible.

[Via Slashdot].

CRC

In case you ever wondered how CRC worked (or how to use what you learned in Polynomials, Rings and Finite Fields), Cyclic Redundancy Check gives a short description of the math behind CRC as well as how to implement it as an algorithm.