Open Source Symbolic Math Packages?
3Suns asks: "There are many proprietary symbolic mathematics suites available, including Mathcad, Mathematica, and Maple. Strangely, I can't find a single free software project with similar functionality. These programs are as ubiquitous in universities and engineering companies as they are expensive. Given the deep roots of open-source in higher education, what can explain the lack of free/open-source mathematics software?" We last addressed this question three
years ago, but a lot can change in that time. Has it?
Yes, maxima...
s h.html
http://maxima.sourceforge.net/
or giac...
http://www-fourier.ujf-grenoble.fr/~parisse/engli
(giac, interestingly enough, runs on PDA's for a mobile solution...)
If you haven't found open source CAS, you haven't really looked...
For commutative algebra, for example, there's Macaulay2.