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The Hilltop algorithm is an algorithm used to find documents relevant to a particular keyword topic. Created by Krishna Bharat while he was at Compaq Systems Reseority" pages: an "expert" is a page that links to lots of other relevant documents; an "authority" is a page that has links pointing to it from the "expert" pages. Here they mean pages about a specific topic with links to many non-affiliated pages on that topic. If a website has backlinks from many of the best expert pages it will be an "authority".
In theory, Google finds "expert" pages and then the pages that they link to would rank well. Pages on sites like Yahoo!, DMOZ, college sites and library sites are usually considered experts.
- Hilltop: A Search Engine based on Expert Documents by K. Bharat and G.A. Mihaila
- Archived April 1, 2007, at the Wayback Machine.
- When Experts Agree: Using Non-Affiliated Experts to Rank Popular Topics by K. Bharat and G. A. Mihaila is substantially the same, but under a different title.
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