#6465: Derivative D acts wrongly on symbolic integration
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Reporter: gmhossain | Owner:
Type: defect | Status: needs_review
Priority: critical | Milestone: sage-4.3.2
Component: symbolics | Keywords:
Author: Burcin Erocal, Golam Mortuza Hossain | Upstream: N/A
Reviewer: Tim Dumol | Merged:
Work_issues: |
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Comment(by kcrisman):
I've applied every one of Burcin's patches I could find, and get only one
type of doctest failure with all of them (when applied in the right
order). So so far so good! Unfortunately, I can't review any of them for
two reasons - my understanding of C++/Pynac is not reliable enough to do a
good job, and there are so many failures until one applies ''all'' the
patches that it's hard to separate out what's what.
The reason I say that here is that I do get a significant failure, in a
few different files, for the _tderivative_ method, though the actual
failure occurs as a RuntimeError in line 216 of sage/misc/derivative.pyx
(with no error message, more's the pity). For instance, in line 99 of
sage/symbolic/integration/integral.py,
{{{
sage: f = function('f'); a,b = var('a,b')
sage: h = indefinite_integral(f(x), x)
sage: h.diff(x)
RuntimeError
}}}
I hope this helps track it down.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6465#comment:13>
Sage <http://www.sagemath.org>
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