PR(A)Rank of page A
=
(1 − d)Bored surfer jumps to a random page
+
d ×d = 0.85: chance the surfer keeps clicking
Σ PR(T) / C(T)Every page T linking to A splits its rank over its C(T) links
Brin and Page, 1998. Repeat for every page until the numbers stop changing.