Does anybody recommend a good computer algebra system for linux? If you're familiar with Derive 6, then you have a good idea of what i'm looking for. Unfortunately, I'm on a budget and would prefer free over $99. (http://epsstore.ti.com/webs/catlist.asp?deptid=165&catid=580) Thanks, -- Josh Detwiler <joshdetwiler at comcast.net>