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# The pagerankalgorithm

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### The pagerankalgorithm

1. 1. The PageRank algorithm The Anatomy of a Large-Scale Hypertextual Web Search Engine Sergey Brin and Lawrence Page, 1998 David Pinto Faculty of Computer Science, BUAP
2. 2. Introduction
3. 3. The PageRank algorithm <ul><li>Let G=<V,E> be a directed graph </li></ul><ul><ul><li>V = vertex of G </li></ul></ul><ul><ul><li>E = edges of G, E  V  V </li></ul></ul><ul><ul><li>For v i  V, </li></ul></ul><ul><ul><ul><li>Let In(v i ) be the set of vertices that point to v i </li></ul></ul></ul><ul><ul><ul><li>Let Out(v i ) be the set of vertices that v i points to </li></ul></ul></ul>
4. 4. The PageRank algorithm <ul><li>d=0.85, representa la probabilidad de que un navegante continúe pulsando links al navegar por Internet en vez de escribir una url directamente en la barra de direcciones o pulsar uno de sus marcadores. </li></ul>
5. 5. Keyword extraction
6. 6. Summaries by extraction
7. 7. Summaries by extraction
8. 8. Summaries by extraction
9. 9. Questions? David Pinto, FCC, BUAP