title: Extrapolation Methods for Accelerating PageRank Computations
creator: Kamvar, Sepandar
creator: Haveliwala, Taher
creator: Manning, Chris
creator: Golub, Gene
subject: Computer Science
subject: Miscellaneous
description: We present a novel algorithm for the fast computation of PageRank, a hyperlink-based estimate of the ``importance'' of Web pages.  The original PageRank algorithm uses the Power Method to compute successive iterates that converge to the principal eigenvector of the Markov matrix representing the Web link graph.  The algorithm presented here, called Quadratic Extrapolation, accelerates the convergence of the Power Method by periodically subtracting off estimates of the nonprincipal eigenvectors from the current iterate of the Power Method.  In Quadratic Extrapolation, we take advantage of the fact that the first eigenvalue of a Markov matrix is known to be 1 to compute the nonprincipal eigenvectors using successive iterates of the Power Method.  Empirically, we show that using Quadratic Extrapolation speeds up PageRank computation by 25--300\% on a Web graph of 80 million nodes, with minimal overhead. Our contribution is useful to the PageRank community and the numerical linear algebra community in general, as it is a fast method for determining the dominant eigenvector of a matrix that is too large for standard fast methods to be practical. 
date: 2003
type: Conference or Workshop Item
type: NonPeerReviewed
format: application/pdf
identifier: http://ilpubs.stanford.edu:8090/865/1/2003-16.pdf
identifier: Kamvar, Sepandar and Haveliwala, Taher and Manning, Chris and Golub, Gene (2003) Extrapolation Methods for Accelerating PageRank Computations. In: Twelfth International World Wide Web Conference (WWW 2003), May 20-24, 2003, Budapest, Hungary.
relation: http://ilpubs.stanford.edu:8090/865/