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[Axiom-math] Re: [Axiom-developer] Re: partfrac, expand, combine, rewrit
From: |
Dylan Thurston |
Subject: |
[Axiom-math] Re: [Axiom-developer] Re: partfrac, expand, combine, rewrite and simplify. |
Date: |
Sat, 11 Oct 2003 22:41:58 -0400 |
User-agent: |
Mutt/1.5.4i |
On Tue, Oct 07, 2003 at 10:19:14AM -0400, Tim Daly wrote:
>
> > // 1 //
> > I use mupad and I find very pretty the only 4 commands :
> > expand, combine, rewrite and simplify (with or without an option)
> >
> > expand (binomial (n, 3)) -> n(n-1)(n-2)/6
> > expand (sin (2*x)) -> 2 sin(x) cos(x)
> >
> > combine (sin(x)^2, sincos) ->(1-cos(2x))/2
> >
> > rewrite (..., opt) with opt=exp, sincos, sinhcosh, etc.
> > for rewriting
> >
> > simplify tries to simplify, but it's not so sure.
> >
> > In axiom I find a lot of functions as factorials, htrigs, expandTrigProducts
> > but no pretty front-end function. Is there ?
> > What tells axiom about such general functions ?
> >
>
> Unfortunately your question doesn't seem to have a simple answer.
> I've never used mupad but it appears that the functions you mention
> are using a tree-like representation of the expression and allow you
> to manipulate the tree.
So how do you actually get the answer n(n-1)(n-2)/6 for binomial(n,3)?
Is there a way to do this?
binomial(n,3) is not evaluated; applying factorials gives n!/6*(n-3)!;
but I don't see how to get n(n-1)(n-2)/6.
Peace,
Dylan
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- [Axiom-math] Re: partfrac, expand, combine, rewrite and simplify., Tim Daly, 2003/10/07
- [Axiom-math] Re: [Axiom-developer] Re: partfrac, expand, combine, rewrite and simplify., Dylan Thurston, 2003/10/07
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- [Axiom-math] Re: [Axiom-developer] Re: partfrac, expand, combine, rewrite and simplify.,
Dylan Thurston <=
- [Axiom-math] Re: partfrac, expand, combine,rewrite and simplify., Bill Page, 2003/10/12
- Re: [Axiom-math] Re: partfrac, expand, combine,rewrite and simplify., root, 2003/10/12
- Re: [Axiom-math] Re: partfrac, expand, combine,rewrite and simplify., fmaltey, 2003/10/13
- Re: [Axiom-math] Re: partfrac, expand, combine,rewrite and simplify., Dylan Thurston, 2003/10/13
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