An XCas question....

[webmasterpdx]

Oh, I understand. In fact as I'm learning the Prime CAS, I'm becoming more and more familiar with the signature, as you call it. In fact, I'd say, becoming familiar with this signature should be the first thing anyone using it should learn, as how you specify the problems and interpret the results is very much dependent on this. In fact, I've started to update a page that I hooked up to the Prime wiki with these kinds of tips to help newbies to get up to speed with the "signature" quickly, and I'll continue to add things as I discover them myself.....here...
http://www.wiki4hp.com/doku.php?id=prime:cashome
I understand how complex CAS is, and it's one of the forefront fields of computing. I was around when this stuff was first being explored, as CAS allows many supercomputing solutions to problems to be done using CAS instead, which was one of the reasons it was being explored by the supercomputing gurus back in the 80's.
WolframAlpha/Mathematica is a product that to get the full product license would cost you something like $7000, so having results comparable to a $7000 solution in a $100 calculator is pretty impressive, so I'm pretty impressed with the Prime so far.
I'm sure XCas will evolve and improve with time, and the HP Prime's version will follow that curve.