#17507: minor error with integral.n()
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Reporter: rws | Owner:
Type: defect | Status: needs_info
Priority: minor | Milestone: sage-6.5
Component: calculus | Resolution:
Keywords: | Merged in:
Authors: Ralf Stephan | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/rws/minor_error_with_integral_n__| 87fb1030cd271861aafe2fb42e58ab03df87e34a
Dependencies: | Stopgaps:
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Comment (by rws):
As to the message, please go ahead. The `expression.variables()` returns a
lexically sorted list but the `function.arguments()` returns the arguments
as they are given. This can get really confusing:
{{{
sage: f(x,a) = 1/(a+x^2)
sage: f.variables()
(a, x)
sage: f.arguments()
(x, a)
sage: numerical_integral(f, 1, 2, max_points=100, params=[10])
(0.08148091340506758, 9.046198612979459e-16)
sage: numerical_integral(1/(a+x^2), 1, 2, max_points=100, params=[10])
(0.00985229644301163, 1.0938246356464044e-16)
}}}
OTOH, giving a dictionary always involves the user more than a list. So
maybe we should at least put a warning in the documentation about this. If
you feel up to it, cvould you please?
--
Ticket URL: <http://trac.sagemath.org/ticket/17507#comment:9>
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