#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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Comment(by cremona):
e=0 is a hard case since there are too many solutions -- do we want to
return all a in the ring? or all invertible a?
Similarly, do we allow negative e, where b must be invertible and
b.nth_root(e) == (1/b).nth_root(-e), with an error if b is not invertible?
Or do we want to specify in the documentation that e must be positive, and
raise an error if not?
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7931#comment:26>
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