#14334: integral of multivariate polynomial
-------------------------------------------+--------------------------------
Reporter: chapoton | Owner: malb
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.9
Component: commutative algebra | Resolution:
Keywords: integral of polynomials | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Frédéric Chapoton | Merged in:
Dependencies: | Stopgaps:
-------------------------------------------+--------------------------------
Comment (by novoselt):
Well, I think that top level function `integral` should work in this case,
perhaps with symbolic ring as parent. If integral method is called
directly, it still would be better to have a less cryptic message than
that rationals cannot be integrated.
Also, with the patch I get
{{{
sage: ZZ["x, y"]("x*y+x-y").integral(x)
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
<ipython-input-5-c6379f42d83e> in <module>()
----> 1 ZZ["x, y"]("x*y+x-y").integral(x)
/home/novoselt/sage-5.9.beta0/local/lib/python2.7/site-
packages/sage/structure/element.so in
sage.structure.element.Element.__getattr__
(sage/structure/element.c:3637)()
/home/novoselt/sage-5.9.beta0/local/lib/python2.7/site-
packages/sage/structure/misc.so in
sage.structure.misc.getattr_from_other_class
(sage/structure/misc.c:1507)()
AttributeError:
'sage.rings.polynomial.multi_polynomial_libsingular.MPolynomial_libsingular'
object has no attribute 'integral'
}}}
and somehow here it feels that the method should succeed, since
{{{
sage: integrate(ZZ["x, y"]("x*y+x-y"), x)
1/2*x^2*y + 1/2*x^2 - x*y
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14334#comment:4>
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 unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
