#5396: Wrapping lcalc library
------------------------------------------+---------------------------------
Reporter: rishi | Owner: Rishi
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-4.3.2
Component: number theory | Keywords: lcalc
Author: rishi, ylchapuy | Upstream: N/A
Reviewer: John Cremona, David Kirkby | Merged:
Work_issues: |
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Changes (by drkirkby):
* status: needs_review => needs_info
Comment:
I'm a bit concerned about the need to change the doctest to check for a
result which is very different from the original, so the doctest chances
from
{{{
0.305999824716...
to
0.305999..
}}}
I know numerical noise does occur in calculations, but this seems a lot of
it. Is there independant verification the new result is correct (in which
case let's use it, and not all the dots), or is there independant
verification the old result is correct, in which case it is doubtful this
should be put in.
I've expressed concern before about the way lcalc hides compiler warnings,
which happened to be in a way that it stopped the Solaris build #6609. It
basically added a compiler flag, which was supposed to be sent to the gnu
assembler, to suppress warnings.
There are also #7178 and #7065 which I've raised.
The fact this is so such a different result to the previous one, deserves
some explanation I feel. I'd like to see an independent check with
Mathematica.
I'm marking it as 'needs info', as I think we should not just ignore the
different result, but understand why it is so different.
Dave
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5396#comment:49>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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