|Bill Allombert on Thu, 30 Oct 2003 12:10:10 +0100|
[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]
|Re: new user|
On Wed, Oct 29, 2003 at 09:03:07PM +0100, Marko Riedel wrote: > > Hi folks, > > I downloaded and compiled PARI yesterday and I'm quit excited about > learning how to use GP and program with libpari. > > I have two very basic questions: > > - how do I invert a matrix of rational functions with GP or using > libpari? Under GP it is easy: ? M=[a,b;c,d]; ? M^-1 %2 = [d/(d*a - c*b) -b/(d*a - c*b)] [-c/(d*a - c*b) a/(d*a - c*b)] Don't expect good performances if there are lots of variables, though. > - does GP or libpari have a feature for symbolic integration or > differentiation? Not really. Only when both data and result are rational functions. See intformal() and deriv(). Cheers, Bill.