#20243: Count real roots of polynomials using Sturm sequences
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Reporter: kedlaya | Owner: kedlaya
Type: enhancement | Status: needs_work
Priority: minor | Milestone: sage-7.2
Component: algebra | Resolution:
Keywords: polynomials, | Merged in:
root-counting, days71 | Reviewers:
Authors: Kiran Kedlaya | Work issues:
Report Upstream: N/A | Commit:
Branch: | 3f52ae0a26e0c8427013c29c2f2262a3d5eaea84
u/kedlaya/count_real_roots_of_polynomials_using_sturm_sequences| Stopgaps:
Dependencies: #20256 |
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Comment (by jdemeyer):
Replying to [comment:10 kedlaya]:
> Or have you seen the 2.8 user guide yet (which I haven't found)?
PARI-2.7 is ancient. In PARI-2.8, the syntax has changed, you are supposed
to use `polsturm(pol, [a,b])` instead.
The PARI-2.8 user guide might not be online, but you can access the
documentation from Sage: run `./sage --gp` and then type `??polsturm`.
I created #20257 to deprecate `pari(...).polsturm(a, b)` in Sage.
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Ticket URL: <http://trac.sagemath.org/ticket/20243#comment:11>
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