Math
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Pi Day
Pi, Greek letter ( ), is the symbol for the ratio of the circumference of a circle to its diameter. Pi Day is celebrated by math enthusiasts around the world on March 14th. Pi = 3.1415926535…
The Erdös Number Project This is the website for the Erdös Number Project, which studies research collaboration among mathematicians. The site is maintained by Jerry Grossman at Oakland University . Patrick Ion , a retired editor at Mathematical Reviews , and Rodrigo De Castro at the Universidad Nacional de Colombia, Bogota provided assistance in the past. Please address all comments, additions, and corrections to Jerry at grossman@oakland.edu .
Erdös Number Project - The Erdös Number Project - Oakland University
Hypatia of Alexandria - About the Female Philosopher Hypatia of Alexandria
You almost expect to hear: "she was a fine philosopher -- for a woman " when hearing about ancient female prodigies. After all, our predecessors' opportunities, especially if they were "respectable" women, were nearly non-existent. Hypatia was, simply, the last great Alexandrian mathematician and philosopher. By writing a commentary on The Conics of Apollonius of Perga which divided cones into sections by a plane, Hypatia made geometry intelligible to her students and ultimately transmissible. Since men thronged to hear her ideas on philosophy, she taught neoplatonic ideas to pagans and Christians alike, including Synesius of Cyrene, who helped refine the doctrine of the Trinity.
PlanetMath
Welcome to the new PlanetMath server. After many months of instability culminating in a major crash, we have decided to simply migrate to the next version of our content management software, Noosphere 1.5. As of now all data since late 2011-10-23 has been lost , and some functionality is broken or missing.