From: A tutorial on information retrieval: basic terms and concepts
PageRank is defined as follows [8]: |
We assume web page A has pages T_{1}...T_{n} which link to it. The parameter d is a damping factor which can be set between 0 and 1 (usually set to 0.85). Also, C(A) is defined as the number of links going out of page A. The PageRank of a page A is given as follows: |
PR(A) = (1-d) + d (PR(T_{1})/C(T_{1}) + ... + PR(T_{n})/C(T_{n})) |
PageRanks form a probability distribution over web pages. The PageRank value of a web page reflects the frequency of encountering that page by a Web user who surfs across the web following links randomly. |