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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
http://lists.nongnu.org/archive/html/axiom-developer/2005-06/msg00294.html
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.
WE NEED MORE ALGEBRA DEVELOPERS!
Martin
- [Axiom-developer] Expression problems, Hans Peter Würmli, 2005/11/06
- RE: [Axiom-developer] Expression problems, Bill Page, 2005/11/06
- Re: [Axiom-developer] Expression problems, Francois Maltey, 2005/11/07
- Re: [Axiom-developer] Expression problems,
Martin Rubey <=
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- [Axiom-developer] Problems compiling modified Spad file under debian, Martin Rubey, 2005/11/23
- [Axiom-developer] Re: Problems compiling modified Spad file under debian, Francois Maltey, 2005/11/23
- RE: [Axiom-developer] Re: Problems compiling modified Spad file underdebian, Bill Page, 2005/11/23
- Re: [Axiom-developer] Re: Problems compiling modified Spad file underdebian, Camm Maguire, 2005/11/23
- Re: [Axiom-developer] Re: Problems compiling modified Spad file underdebian, Francois Maltey, 2005/11/24
- Re: [Axiom-developer] Re: Problems compiling modified Spad file underdebian, Camm Maguire, 2005/11/25
- Message not available
- Re: [Axiom-developer] Re: Problems compiling modified Spad file underdebian, Camm Maguire, 2005/11/25
- Re: [Axiom-developer] Expression problems, Martin Rubey, 2005/11/13