|Bill Allombert on Fri, 11 Apr 2003 11:12:43 +0200|
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|Re: Using PARI as a library|
On Fri, Apr 11, 2003 at 08:53:45AM +0100, Alberto Simões/EPL wrote: > Hello > > We are developing a tool for Gnome which aims to be (well, to dream is > free) a Mathematica clone. Of course we know how to program Gtk/Gnome, > write parsers, evaluate formulae... but we dont have any knowledge of > algebric/symbolic computation. PARI is not able to perform symbolic computation with arbitrary expressions. For example an expression like sin(x+1) will be evaluated as a power serie. This may not be what you want. > So, we were looking for a library which could do this for us. I > downloaded Pari/GP, and it seems a brilliant application... but > as I read (well, looked to it) the documentation, it seems not so > easy like that to use Pari library. I would say it is rather easy: 1) Initialise pari with pari_init(4000000,50000); 2) operation on PARI object is done with gadd(), gsub(), gmul(), gdiv(). > Can anybody point if it can be feasible, or should we adopt GP and > only do a GUI frontend? (well... I would like to maintain my own > language and parser...) I think it is feasible. You may want to look at GP2C. This program contains a reimplementation of the GP parser in yacc, but would work as well with a parser for another language, but for the fact it is suppose to be a compiler for GP :). Also GP2C can help you understanding how to program in PARI library. Be sure to understand PARI memory model and semantic before starting anything serious based on PARI. Cheers, Bill.