#11352: is_polynomial returns wrong results
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Reporter: hivert | Owner: burcin
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.0
Component: symbolics | Keywords: is_polynomial
Work_issues: | Upstream: Fixed upstream, in a later stable
release.
Reviewer: | Author: Richard Kreckel, Jens Vollinga,
Burcin Erocal
Merged: | Dependencies: #11415
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Changes (by newvalueoldvalue):
* status: needs_info => needs_review
* milestone: sage-4.7.1 => sage-5.0
* dependencies: => #11415
* author: => Richard Kreckel, Jens Vollinga, Burcin Erocal
Old description:
> {{{
> sage: el = -1/2*(2*x^2 - sqrt(2*x - 1)*sqrt(2*x + 1) - 1)
> sage: el.is_polynomial(x)
> True
> }}}
> I definitely prefer to get {{{False}}}.
New description:
{{{
sage: el = -1/2*(2*x^2 - sqrt(2*x - 1)*sqrt(2*x + 1) - 1)
sage: el.is_polynomial(x)
True
}}}
I definitely prefer to get {{{False}}}.
Apply trac_11352-is_polynomial.patch.
--
Comment:
New pynac package which includes the patch for this is at #11415.
attachment:trac_11352-is_polynomial.patch adds doctests.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11352#comment:15>
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