#9758: implement Watkins-Delaunay's algorithm for computing modular degrees in
Sage
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Reporter: was | Owner: was
Type: enhancement | Status: new
Priority: major | Milestone: sage-4.5.3
Component: number theory | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by drkirkby):
* cc: cremona (added)
Comment:
I'm adding John Cremona to this, as I think this is his area of interest.
If not, John can delete himself!
For anyone taking this project on, it may be useful to know that in the
opinion of Mark Watkins, double-precsion maths is '''probably''' good
enough for computing the modular degrees. That would no doubt make the
code simpler and faster than using MPFR. See
http://groups.google.co.uk/group/sage-devel/msg/ecac09831622179c
Strange as it may seem, fixing the SYMPOW bug (#9703) was actually one of
the more interesting changes I've made to Sage. It required reading the
paper in the quad double package to understand how that was supposed to
work, then reading the Intel manual on the 387 processor to sort out how
to get the processor to work as required by quad double.
Dave
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9758#comment:4>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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