#10709: speed up matrix actions on Manin symbols
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Reporter: AlexGhitza | Owner: craigcitro
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-4.7
Component: modular forms | Keywords: manin symbol binomial
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by davidloeffler):
* status: needs_review => needs_work
Comment:
I don't like the following:
{{{
sage: a = ZZ(10); b = (2*a).binomial(a, algorithm="spam")
sage: b is None
True
}}}
It should probably raise an error if the algorithm is unrecognized, not
just fall of the end of the function and return None.
Also, the "algorithm = mpir" option doesn't seem to allow the computation
to be interrupted with Ctrl-C, so if you feed it a very large number by
mistake you end up with no alternative but to kill your entire sage
session. (The Pari implementation seems to handle interrupts better.)
Finally, I'd very much prefer it if the generic "binomial" function,
called with an integer object, just called the binomial method of that
object, and allowed the user to specify an algorithm there instead.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10709#comment:2>
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