#12949: Better congruence testing for odd arithmetic subgroups
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Reporter: davidloeffler | Owner: craigcitro
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-5.11
Component: modular forms | Resolution:
Keywords: | Work issues: bring back old code + minor
doc
Report Upstream: N/A | Reviewers: Vincent Delecroix
Authors: David Loeffler | Merged in:
Dependencies: | Stopgaps:
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Changes (by davidloeffler):
* status: needs_work => needs_info
Comment:
Dear Vincent,
Nice to hear from you; sorry it's taken me so long to look at this in
turn...
- I didn't remove the reference to Gorinov. I just moved it a little
higher in the list so the references were listed in alphabetical order.
- Hamilton's dissertation isn't available publicly anywhere, sadly;
Warwick doesn't maintain an archive of MMath dissertations, although it
does for MSc and PhD degrees. If you want to check the result, I have a
copy I can send to you personally, if you like.
- I'm not quite sure what you're suggesting re keeping both algorithms. At
the moment we have one (fast) algorithm for even subgroups only, and
another (much slower) algorithm for odd subgroups. It seems silly to
distinguish needlessly between even/odd -- would you be happier with a
setup where we have both algorithms available for both types of subgroups
(with the fast one the default, of course)?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12949#comment:5>
Sage <http://www.sagemath.org>
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