Google’s Page Rank Algoritm in its original form 

If you can understand this, there is a good chance you will want to read the American Mathematical Society’s feature article “ How Google finds your Needle in the Web’s Haystack” The article describes Google’s PageRank algorithm and how it returns pages from the Web’s collection of 25 billion documents. According to David Austin from Grand Valley State University, the trick is to ask the Web itself to rank the importance of pages. I wish you luck!