#4000: [with patch, needs work] Implement QQ['x'] via Flint ZZ['x'] +
denominator
------------------------------+---------------------------------------------
Reporter: malb | Owner: somebody
Type: enhancement | Status: new
Priority: major | Milestone: sage-wishlist
Component: basic arithmetic | Keywords:
Reviewer: | Author: Martin Albrecht
Merged: |
------------------------------+---------------------------------------------
Comment(by spancratz):
Almost all of the memory problems are now resolved. They were arising
because I wrongly assumed ``fmpz_`` methods (*not* ``fmpz_poly_``; they
work just fine) supported aliasing of the inputs and outputs. Apart from
the method ``fmpz_neg``, I think I have fixed this in all places where I
am using it, apart from the square-free decomposition in
polynomial_rational_flint.pyx. I'll rewrite that, too, but I've already
checked that this method does not get called in the following last two
remaining doctest failures:
{{{
The following tests failed:
sage -t "devel/sage/sage/rings/qqbar.py"
sage -t "devel/sage/sage/structure/sage_object.pyx"
}}}
The test in ``qqbar.py`` that seems to break down is the following piece
of code:
{{{
sage: x = polygen(AA)
sage: r = QQbar.polynomial_root(x^5 - x - 1, CIF(RIF(0.1, 0.2),
RIF(1.0, 1.1))); r
sage: r.real().minpoly()
}}}
The test in ``sage_object.pyx`` that breaks has to do with unpickling, and
it's triggered by the following two lines:
{{{
sage: std = os.environ['SAGE_DATA'] +
'/extcode/pickle_jar/pickle_jar.tar.bz2'
sage: sage.structure.sage_object.unpickle_all(std)
}}}
I will try to chase down the first problem a little further than the
``minpoly()`` function, perhaps I can resolve it myself. But any help
with the second problem in particular would be very much appreciated.
Sebastian
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4000#comment:25>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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