#14723: Error when SymPy can't evaluate an integral
-------------------------------------------------+-------------------------
Reporter: eviatarbach | Owner: burcin
Type: defect | Status:
Priority: major | needs_work
Component: calculus | Milestone: sage-6.4
Keywords: sympy, integrate | Resolution:
Authors: Eviatar Bach | Merged in:
Report Upstream: Completely fixed; Fix | Reviewers:
reported upstream | Work issues: fix in
Branch: | sympy
Dependencies: | Commit:
| Stopgaps:
-------------------------------------------------+-------------------------
Changes (by rws):
* upstream: Reported upstream. Developers acknowledge bug. => Completely
fixed; Fix reported upstream
Comment:
This Sympy patch completely fixes the issue. A pull request containing it
was reported there and waits for review.
https://github.com/sympy/sympy/pull/8592
{{{
diff --git a/sympy/integrals/integrals.py b/sympy/integrals/integrals.py
index 2a3ccfe..ac434c5 100644
--- a/sympy/integrals/integrals.py
+++ b/sympy/integrals/integrals.py
@@ -1070,6 +1070,27 @@ def as_sum(self, n, method="midpoint"):
result += self.function.subs(sym, xi)
return result*dx
+ def _sage_(self, ):
+ from sage.symbolic.integration.integral import definite_integral,
indefinite_integral
+ f, limits = self.function, list(self.limits)
+ limit = limits.pop(-1)
+ if len(limit) >= 2:
+ if len(limit) == 2:
+ x, b = limit
+ a = None
+ else:
+ x, a, b = limit
+ return definite_integral(f._sage_(),
+ x._sage_(),
+ a._sage_(),
+ b._sage_(),
+ hold=True)
+ else:
+ x = limit[0]
+ return indefinite_integral(f._sage_(),
+ x._sage_(),
+ hold=True)
+
@xthreaded
def integrate(*args, **kwargs):
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/14723#comment:17>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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