#10682: sum fails with lower bound != 0 or 1 (upgrade maxima to 5.26)
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Reporter: fmaltey
| Owner: burcin
Type: defect
| Status: needs_work
Priority: critical
| Milestone: sage-5.0
Component: symbolics
| Keywords:
Work_issues: several doctests need to be patched due to changes in output
format/term order | Upstream: N/A
Reviewer:
| Author:
Merged:
| Dependencies:
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Comment(by dimpase):
Replying to [comment:35 kcrisman]:
> Good points. That being said, if the DE is one that is more complicated,
and some nasty expression plays the role that `x` does here, we don't want
to try to figure out if that expression is real or not.
I thing we should not try to do our own processing of assume()'s at this
point. On another ticket, maybe.
Regarding the domain switch, I simply could not find a place to hook it
up, as an independent call, instead opting for desolve() to have an extra
parameter. If you read desolve() code you see that it digs up the maxima
instance to call, as the parent of the expression. I could not find an
independent, "global" hook to call maxima, and it seems that it might not
even be exposed. It seems that the original design aimed at possibly many
independent maxima instances to be run.
By the way, the call of desolve with domain='complex', (or just with
domain omitted) will reset the domain back to complex. As such, this gives
one a way to control the domain, something that was missing in the maxima
interface before (although it is a hack).
Any thoughts on this?
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10682#comment:36>
Sage <http://www.sagemath.org>
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