#7616: fix bug in trivial number field extensions
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Reporter: rlm | Owner: rlm
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.3
Component: number fields | Keywords:
Work_issues: | Author: Robert Miller and Robert Bradshaw
Upstream: N/A | Reviewer:
Merged: |
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Comment(by craigcitro):
Aha, I misunderstood. This isn't going to change `K.extension(y)` -- it's
going to change `K.extension(y).gens()`, which is currently wrong. In
particular, if you look at the comments on #2767 (where this bug was
actually introduced), I was assuming that the polynomial generating the
relative extension was of the form `x-a`, where `a` was any '''nonzero'''
value. As the example in the patch points out, `a` might be 0. `:)`
I need to finish reading the Pari docs, but it looks like this extra entry
in the Pari RNF is exactly what we want. Review coming shortly.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7616#comment:4>
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