#3354: Bug in power series sqrt
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Reporter: robertwb | Owner: somebody
Type: defect | Status: needs_review
Priority: major | Milestone: sage-duplicate/invalid/wontfix
Component: basic | Resolution:
arithmetic | Merged in:
Keywords: power | Reviewers:
series | Work issues:
Authors: | Commit:
Report Upstream: N/A | Stopgaps:
Branch: |
Dependencies: |
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Comment (by vdelecroix):
In the description there is
{{{
Perhaps the error is just bad, but it should be able
to compute this by extending to a field with sqrt(2).
}}}
Note that the following works, but it is not very direct
{{{
sage: (2+t).change_ring(QuadraticField(2)).sqrt()
a + 1/4*a*t - 1/32*a*t^2 + 1/128*a*t^3 - ... + O(t^20)
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/3354#comment:8>
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