#7931: Improved nth root for finite fields and integer_mods
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Reporter: roed | Owner: roed
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.6
Component: algebra | Keywords: finite fields, nth root
Author: David Roe | Upstream: N/A
Reviewer: Paul Zimmermann | Merged:
Work_issues: |
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Changes (by roed):
* status: needs_work => needs_review
Comment:
Unexpected indeed. Thanks for checking all these corner cases that I
neglected (though some of the earlier ones were bugs I should have found
if I'd tested sufficiently).
In this case I'm not quite sure what the right output is: an empty list or
a ZeroDivisionError? I've gone for the empty list, on the theory that
`b.nth_root(e)` should return a list of all elements `a` with a^e^=b, and
this makes sense even if `e=0`.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7931#comment:25>
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