#19362: Improve refine_root()
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Reporter: jdemeyer | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.9
Component: algebra | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jdemeyer/ticket/19362 | 950eb84d640cb06b0d4ca8363845922713ec8fe6
Dependencies: #19361 | Stopgaps:
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Changes (by jdemeyer):
* status: needs_review => needs_work
Comment:
{{{
sage: from sage.rings.polynomial.refine_root import refine_root
sage: RIF = RealIntervalField(106)
sage: R.<x> = RIF[]
sage: pol = 10*x^6 - 10*x^2 + 1
sage: refine_root(pol, pol.derivative(), RIF(3/4,9/8), RIF)
Traceback (most recent call last):
...
ArithmeticError: cannot refine polynomial root (not enough steps?)
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/19362#comment:5>
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