#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 jpflori):
Replying to [comment:40 nbruin]:
> ideas of dealing with threads either. So, if in `desolve` (conditional
on domain="real") we just do: ` P("load('contrib_ode)") ... try:
P("domain: real") soln = P(cmd) finally: P("domain: complex") ` we should
be fine (the "try ... finally" should guard that we end up with `domain:
complex`). I don't think performance is a concern if we're doing a "load"
every time anyway!.^^
That's the kind of solution I would propose.
As far as the Maxima instance is concerned, you get it through the
._maxima_().parent() call in nintegral(...) and it happens to be the
unique library instance of Maxima (which is currently used for all the
calculus stuff). In particular, a call to nintegral should not modify its
settings.
To refine Nils answer, Id say that in try we set domain to the option
passed and in "finally" we should restore the previous value of domain
which could be "real"rather than "complex" if the user decided to change
it globally.
To get the previous value something like str(P('domain').strip(' ') would
do at the Sage level although this is kind of dirty (and surely slow)
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10682#comment:41>
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