#15808: Remove genus2reduction
-------------------------------------+-------------------------------------
Reporter: jdemeyer | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.4
Component: packages: | Resolution:
standard | Merged in:
Keywords: | Reviewers:
Authors: Jeroen Demeyer | Work issues:
Report Upstream: N/A | Commit:
Branch: | 1068fef87401f820747d4f938a56d2429afbe4b0
public/ticket/15808 | Stopgaps:
Dependencies: #15767 |
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Comment (by pbruin):
We can also decide to give up trying to imitate the original program
perfectly and allow the power of 2 to be different. I am attaching a
patch that does this.
I also think you used an incorrect criterion to decide when the 2-part of
the conductor was not computed. For example, one of the current doctests
has the line
{{{
Conductor (away from 2): 954
}}}
Note that the "away from 2" part should only be there if the returned
conductor is odd. According to the PARI documentation, we should check if
2 appears to the power -1 in the factorisation (fake at 2 in this case) of
the conductor. This is fixed by the last part of the patch.
--
Ticket URL: <http://trac.sagemath.org/ticket/15808#comment:17>
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