[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Axiom-developer] Expression problems

From: Martin Rubey
Subject: Re: [Axiom-developer] Expression problems
Date: 13 Nov 2005 13:01:41 +0100
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.4

Francois Maltey <address@hidden> writes:

> Hello everybody ! Hans, Bill and others...
> > I am struggling with dealing with Expressions. For most sake and purposes I 
> > can find a fix and solve my small problems, but I never feel very assured.
> I have the same problem when I try to expand cos(2*x) in cos(x)^2-sin(x)^2.
> The expand(cos(x+y)) is right, but expand (cos(2*x)) remains cos(2*x).
> Martin and Bill help me, but I can't see the pretty way to write
> my own expand which also compute for cos(2*x).

I believe that the "correct" way to do this is to patch the existing domains.

You did not respond to

so I thought that you managed to get the results you wanted. Are you able to
program in SPAD or Aldor already? I can help, if necessary. 

Maybe you could find out where the code for Chebyshev expansion should be
inserted, possibly using the )trace facility - also described on MathAction:
look at DebuggingAxiom.



reply via email to

[Prev in Thread] Current Thread [Next in Thread]