On 8/29/12 12:16 PM, Nicolas M. Thiery wrote:
> On Wed, Aug 29, 2012 at 12:01:13PM -0700, Mike Zabrocki wrote:
>> Hi,
>> This one looks really serious. In some ways seems to be computer
>> dependent because my answers seem to have twice as
>> many digits as yours.
>
> This really looks like an integer overflow (in the communication with
> Symmetrica?), which might differ depending on the hardware.
I think it is not symmetrica per se, but some wrapper functions around
symmetrica
as the following example shows:
sage: f = eval('symmetrica.t_POWSYM_SCHUR')
sage: f({Partition([2,2]):Integer(1)})
s[1, 1, 1, 1] - s[2, 1, 1] + 2*s[2, 2] - s[3, 1] + s[4]
sage: time g = f({Partition([1]*47):Integer(1)})
Time: CPU 13.03 s, Wall: 13.04 s
sage: f({Partition([2,2]):Integer(1)})
s[1, 1, 1, 1] - s[2, 1, 1] + 2*s[2, 2] - s[3, 1] + s[4]
sage: Sym = SymmetricFunctions(QQ)
sage: p = Sym.power()
sage: s = Sym.schur()
sage: s(p[2,2])
s[1, 1, 1, 1] - s[2, 1, 1] + 4631790164*s[2, 2] - s[3, 1] + s[4]
Best,
Anne
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