#3863: Have numerical evaluation of unevaluated integrals call numerical
integral
------------------------+---------------------------------------------------
Reporter: ddrake | Owner: mhansen
Type: defect | Status: new
Priority: major | Milestone: sage-4.3.1
Component: calculus | Keywords: integration integral calculus symbolic
numerical
Work_issues: | Author:
Upstream: N/A | Reviewer:
Merged: |
------------------------+---------------------------------------------------
Changes (by kcrisman):
* keywords: integration integral calculus symbolic => integration
integral calculus symbolic numerical
* upstream: => N/A
Comment:
Update: in 4.3.alpha1 with Maxima 5.20.1, we now get
{{{
sage: integrate(x^2.7 * e^(-2.4*x), x, 0, 3)
119/6144*2^(3/5)*3^(3/10)*5^(7/10)*gamma(7/10) -
125/20736*2^(3/5)*3^(3/10)*5^(7/10)*gamma_incomplete(37/10, 36/5)
}}}
But it won't evaluate the gamma_incomplete, since for some reason we
aren't translating it to gamma_inc or incomplete_gamma, which are the
supported functions; however, otherwise it is correct (as comparing with
results of numerical_integral).
This does not fix the problem, of course, but I will change the summary to
get at the fundamental thing mhansen and I discussed, and open a separate
ticket (if it doesn't exist) for the gamma_incomplete not being translated
correctly from Maxima. That is #7748.
Do we in the meantime have the _evalf_ method on a symbolic integral that
can be changed?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/3863#comment:6>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
