#11894: problems with infinite sum
------------------------+---------------------------------------------------
Reporter: tmonteil | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone: sage-4.7.2
Component: calculus | Keywords: infinite sum, maxima
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
------------------------+---------------------------------------------------
Comment(by kcrisman):
Hmm, you have quite a few things here. But which of these are a bug, or
should be the main focus of this report?
1. I'm thankful that Maxima provides this for us at all, though of course
summation could be better. I assume it is correct if numerically
approximated? (I don't know the answer that this should give.)
1. `False` just means "can't prove it's True". For this complicated of
an expression, it would be very difficult for `bool` to prove this.
Again, could be enhanced, but not a bug. You may wish to see if some of
the Maxima simplifications could help with this?
1. `RR` does not take the real part of a number. That said, we should
have something that checks this, I think, unless there is an arcane reason
(in this huge expression) we can't.
1. Hmm, this would be a bug in Maxima. We do get the correct error
without the infinity.
{{{
sage: sage: s = sum(1/(m^4 + 2*m^3 + 3*m^2 + 2*m)^2, m, 0, 3)
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call
last)
RuntimeError: ECL says: Error executing code in Maxima: Division by 0
}}}
I've logged this
[https://sourceforge.net/tracker/?func=detail&aid=3418608&group_id=4933&atid=104933
as a Maxima bug].
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11894#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
