In particular, the existence of this document owes itself primarily to some great open source projects, including TeX/LaTeX and Sage. More information on Sage can be found at its website (http://www.sagemath.org).
The current latex document is due to David Joyner, who is responsible for some re-organizing, re-formatting, editing for readability, and any extra material added (for example, the Sage material). Please email corrections to wdjoyner@gmail.com.
The material added in this version is licensed under the GNU Free Documentation License (please see the FDL) as is most of Wikipedia.