Dear Burcin, Tim, Jason, et al. - and sage-support:
This is a new question related to the previous discussion, though it's
not quite the same.
sage: u = function('u')
sage: h,x = var('h,x')
sage: p = diff(u(x+h),h,1)
Okay, so far so good, and in the syntax note that CLEARLY h is the
variable of
This thread now contains some examples of how different computer
algebra systems handle the chain rule. The following might help in
sage <-> maxima communication:
By default, maxima leaves an expression: "diff( f(g(a,b,c),u,v), a)"
untouched. But maxima can in fact represent the result from appl
On Sep 28, 2009, at 11:30 AM, Tim Lahey wrote:
> On Sep 28, 2009, at 2:21 PM, kcrisman wrote:
>
>>
>> Dear support (and/or Burcin),
>>
>> How does Sage/Pynac support derivatives evaluated at a point (or does
>> it)? E.g.,
>>
>> sage: f = function('f',t)
>> sage: h = f.diff(t,1)
>> sage: h.subs(t
On Sep 29, 2009, at 1:44 AM, Jason Grout wrote:
>
> Tim Lahey wrote:
>>
>>
>>
>> Based upon what I recall about the D notation, that's the derivative
>> of f(t) evaluated at t = 0. The f(0) tells where it's evaluated at
>> and
>> the D[0] indicates that it's the derivative with respect to the
Tim Lahey wrote:
>
> On Sep 28, 2009, at 2:21 PM, kcrisman wrote:
>
>> Dear support (and/or Burcin),
>>
>> How does Sage/Pynac support derivatives evaluated at a point (or does
>> it)? E.g.,
>>
>> sage: f = function('f',t)
>> sage: h = f.diff(t,1)
>> sage: h.subs(t=0)
>> D[0](f)(0)
>>
>> But is
On Sep 28, 3:09 pm, Tim Lahey wrote:
> The D notation is used in Maple as an option, but almost always allows
> conversion to the standard notation.
OK, this thread should probably go to sage-devel or elsewhere, but I
don't know how to do that. Maple actually falls back on exactly the
same D no
On Sep 28, 2009, at 5:37 PM, Nils Bruin wrote:
> Would you have suggestions for printing derivatives using partials? I
> think the main problem here is that one needs to "name" the formal
> variables, whereas mathematical notation otherwise identifies
> arguments by position.
>
> For instance, s
On Sep 28, 11:30 am, Tim Lahey wrote:
> > sage: f = function('f',t)
> > sage: h = f.diff(t,1)
> > sage: h.subs(t=0)
> > D[0](f)(0)
>
> Based upon what I recall about the D notation, that's the derivative
> of f(t) evaluated at t = 0. The f(0) tells where it's evaluated at and
> the D[0] indicates
On Sep 28, 2:30 pm, Tim Lahey wrote:
> On Sep 28, 2009, at 2:21 PM, kcrisman wrote:
>
>
>
> > Dear support (and/or Burcin),
>
> > How does Sage/Pynac support derivatives evaluated at a point (or does
> > it)? E.g.,
>
> > sage: f = function('f',t)
> > sage: h = f.diff(t,1)
> > sage: h.subs(t=0)
On Sep 28, 2009, at 2:21 PM, kcrisman wrote:
>
> Dear support (and/or Burcin),
>
> How does Sage/Pynac support derivatives evaluated at a point (or does
> it)? E.g.,
>
> sage: f = function('f',t)
> sage: h = f.diff(t,1)
> sage: h.subs(t=0)
> D[0](f)(0)
>
> But is this what we are looking for?
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