#5084: speed regression in number of partitons
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Reporter: robertwb | Owner: mhansen
Type: defect | Status: new
Priority: major | Milestone: sage-3.4.1
Component: combinatorics | Resolution:
Keywords: |
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Comment (by mabshoff):
Quaddouble is fundamentally broken and numerically unstable. With the
current settings in the partition_cc code out of the first 500 integers
the number of partitions 250 or those are *wrong*, i.e. this problem
happens even in the trivial case. There is no way to fix this AFAIK since
the correct rounding mode is set on Solaris and any use of quaddouble
should be discouraged since it plainly sucks.
Cheers,
Michael
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5084#comment:2>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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