Re: Errors in poliscycloprod

[Charles Greathouse <charles.greathouse@case.edu>]

Ah, excellent.  It works in gp-gitd1d257d.exe and gp-gmp-gitd1d257d.exe.

I think, just in case,
poliscycloprod(x^3-1)
or similar should be added to the test suite.

Charles Greathouse
Analyst/Programmer
Case Western Reserve University

On Wed, May 9, 2012 at 4:56 PM, Bill Allombert
<Bill.Allombert@math.u-bordeaux1.fr> wrote:
> On Wed, May 09, 2012 at 08:47:39AM -0400, Charles Greathouse wrote:
>> Further, on the Windows git version,
>>
>> ? poliscycloprod(x^3-1)
>>   ***   at top-level: poliscycloprod(x^3-1
>>   ***                 ^--------------------
>>   *** poliscycloprod: the PARI stack overflows !
>>   current stack size: 157286400 (150.000 Mbytes)
>>   [hint] you can increase GP stack with allocatemem()
>>
>> which seems to happen for x^k - 1 for all k not a power of 2.
>
> You did not specify which GIT version, but I will hazard a guess:
> gp-git48332bc.exe but 48332bc is not the latest git (48332bc is from Wed May 2)
>
> Unfortunately, gp-gitd1d257d.exe did not pass the test suite, so
> was not put on the server. I just added it.  Please check it.
>
> Under wine it does not exhibit this problem.
>
> Now, the test-cyclo bug:
> On linux 32bit without GMP, the stack is set to 4MB. and the 'portable' FFT code use more
> PARI stack than the GMP FFT code (which use malloc instead), so the stack overflow
> only on 32bit/without GMP.
>
> Cheers,
> Bill.