Hello everyone. I've mailed this list before and have taken the advice obtained from it to write a numerical integration program for some of my needs, and GiNaC seems to be the best way for me to accomplish this. First of all, I have only had Calculus 2, and am just now taking the equivalent of a first semester in Computer Science course using C++ (self study - my high school doesn't offer Comp Science, and I don't know any programmers in my area, so I have to rely on on-line resources - like you people, sorry :-/ ) so this may explain why I found latter parts of the GiNaC tutorial harder to comprehend and also the fact that I'm somewhat new to C/C++ (though I've done a lot of reading, w/o much coding and hacking one tends to forget). I'm actually attempting to write my first C++ program to do Numerical Integration, but I'm having trouble doing this and I wanted to know if someone could show me the source to a simple program using GiNaC to find the summation (for example) of f(x)=x^2 on the interval [1,2] with n=4 (where n == number of intervals). Of course, a=1, b=2, n=4, and integrand=x^2 should all be variables excepted by the summation function. Once I find out how to implement something simple like this, I think I'll be well on my way to writing the program. Once I get it finished, I'll put it up on SourceForge (by finished I mean something that works and isn't too embarrassing). Many thanks in advance, Brandon Barker