On Sat, Jul 18, 2009 at 4:49 PM, Jason Grout<jason-s...@creativetrax.com> wrote:
>
> Burcin Erocal wrote:
>
>> I attached a patch to the trac ticket that contains an initial attempt
>> at the MMA notation:
>>
>> http://trac.sagemath.org/sage_trac/ticket/6344
>>
>
> FYI, a few days ago Burcin uploaded a new patch on 6344 and asked for
> review. Here are the examples:
>
> OLD:
>
>
> sage: var('x,y')
> sage: f = function('f')
> sage: f(x).derivative(x)
> D[0](f)(x)
> sage: f(x,x).derivative(x,2)
> D[0, 0](f)(x, x) + 2*D[0, 1](f)(x, x) + D[1, 1](f)(x, x)
>
>
> NEW:
>
> sage: f(x).derivative(x)
> D[1](f)(x)
> sage: f(x,x).derivative(x,2)
> D[2, 0](f)(x, x) + 2*D[1, 1](f)(x, x) + D[0, 2](f)(x, x)
(1) So the non-latex isn't supposed to change?
(2) Why are these different?
D[0, 0](f)(x, x) + 2*D[0, 1](f)(x, x) + D[1, 1](f)(x, x)
and
D[2, 0](f)(x, x) + 2*D[1, 1](f)(x, x) + D[0, 2](f)(x, x)
In particular, why is it 2*D[0,1] in one and 2*D[1,1] in another?
-- William
>
> NEW LATEX:
>
> sage: latex(f(x).derivative(x))
> f'\left(x\right)
> sage: latex(f(x,x).derivative(x,2))
> f^{(2,0)}\left(x, x\right) + 2 \, f^{(1,1)}\left(x, x\right) +
> f^{(0,2)}\left(x, x\right)
>
>
> More examples:
>
> sage: binomial(x,y).derivative(x)
> <boom>
> sage: latex(floor(x).derivative(x))
> D[0]\left \lfloor x \right \rfloor
> sage: latex(ceil(x).derivative(x))
> D[0]\left \lceil x \right \rceil
>
>
> If you have an issue with the above printing, please speak now! If you
> like this, it'd be great if you'd chime in as well.
>
> Burcin indicates that this is a stepping stone, not necessarily a final
> implementation. However, Burcin points out that we ought to settle on a
> suitable output soon and move on from this issue.
>
> Thanks,
>
> Jason
>
>
>
>
>
>
> >
>
--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
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