#14723: Error when SymPy can't evaluate an integral
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Reporter: eviatarbach | Owner: burcin
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.4
Component: calculus | Resolution:
Keywords: sympy, integrate | Merged in:
Authors: Eviatar Bach, | Reviewers:
Ralf Stephan | Work issues: fix in sympy
Report Upstream: Completely fixed; | Commit:
Fix reported upstream | 099b9f6f1a67a865978bb84fd6c3a2ce29427aaf
Branch: u/rws/i14723 | Stopgaps:
Dependencies: |
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Comment (by asmeurer):
The SymPy integral at a point is used by the differential equation solver
in some cases where it would otherwise have to introduce a new constant
for the lower limit of integration (or use negative infinity, which might
not even converge). There are some examples at
http://docs.sympy.org/latest/modules/solvers/ode.html. The result always
ends up being correct because there always ends up being a + C1 in the
solution. The syntax was borrowed from Maple, which uses it for the same
purpose. Note that this syntax was introduced (by me) before we had an
unevaluated Subs object. If it had existed at the time, I probably would
have just used it instead.
--
Ticket URL: <http://trac.sagemath.org/ticket/14723#comment:36>
Sage <http://www.sagemath.org>
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