#3587: [with patch, needs work] calculus -- wrap maxima's symbolic summation
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Reporter: was | Owner: whuss
Type: enhancement | Status: assigned
Priority: major | Milestone: sage-4.0.1
Component: calculus | Keywords:
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Comment(by whuss):
Replying to [comment:5 burcin]:
> Many thanks for the patch, this was long overdue. A few comments after
reading your patch:
>
> Your patch replicates the way integrate/integral works perfectly.
Though, as Mike wrote in comment:3, we should just call this `sum`. There
is also a discussion about naming here:
>
> http://groups.google.com/group/sage-
devel/browse_thread/thread/bd4eb3b613c98030
>
> I suggest putting a `sum()` function in `sage.misc.misc_c`, that calls
python's `sum()` or your function based on the type/number of the
arguments. Would you like to do this or should I?
It would be great if you could do this.
> Here are some suggested changes:
>
> * rename all instances of the method to `sum` or `symbolic_sum`
> * you should import your function before the doctests in `calculus.py`
to make sure you call the right function
> * it would be good to add a comment to #6197 pointing to the comment
you have in `calculus.py`
> * you could add your code for converting MMA output back to Sage to a
`_sage_()` method in `sage.interfaces.mathematica.MathematicaElement`, see
the `MagmaElement` class in `sage.interfaces.magma` for an example,
similarly for Maple output
> * In the last lines of the docstring for
`sage.symbolic.expression.Expression.summation`, choosen -> chosen
I will take care of these.
>
> In the long term, I would like to see `integral` and `sum` constructs as
subclasses of `sage.symbolic.function.SFunction`, instead of the current
thin wrappers around maxima functionality.
This is definitely necessary. Currently there is no way to interact with
an unevaluated integral or sum.
> I will take a look at the feasibility of doing this over the weekend. I
don't want to hold your patch back for this though.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/3587#comment:6>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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