Hi
On Wed, Jun 10, 2009 at 7:23 PM, Mike Hansen<mhan...@gmail.com> wrote:
> On Wed, Jun 10, 2009 at 3:16 PM, Jason Grout<jason-s...@creativetrax.com>
> wrote:
>> I agree with Robert---functions have ordered, named parameters (thanks
>> to your patch that deprecated not specifying the order of variables!),
>> so we should be able to convert back and forth between D[i](f) and
>> \frac{df}{d<parameter>} or \frac{\partial f}{\partial<parameter>}
>> unambiguously.
>
> No, it's not that easy. These really are two different things.
> Converting from the D[] notation to the diff() notation requires the
> introduction of a dummy variable and an evaluation.
I have re-based (to 4.0.1) an old patch for the ticket
http://trac.sagemath.org/sage_trac/ticket/5711
This patch will allow typesetting of derivatives in both formats.
By default it will typeset "D[0]f(x)" as df/dx (diff format).
One can switch between two typesetting formats as follows
-----------
psi(x) = function('psi',x)
g = diff(psi(x),x)
latex(g)
\frac{d \psi\left(x\right)}{d x}
# Switch to D format
sage.symbolic.pynac.typeset_d_as_diff=False
latex(g)
D[0]\psi\left(x\right)
----------
I would appreciate if someone could review it.
Thanks,
Golam
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