This site contains 8095 articles from the math encyclopedia PlanetMath.org — the only thing we added is a navigational panel on the left, where some metadata about each article is displayed.
Especially we computed the pagerank of each article and clustered them into 36 chunks, which we call chambers here. If an article is e.g. in the first chamber, it indicates a kind of higher importance (within the universe of the PlanetMath.org articles) than an article in chamber 30. Additionally incoming and outgoing links are displayed for each article, sorted by their pagerank/chamber.