Re: bnfnarrow

[Igor Schein <igor@txc.com>]

On Thu, Mar 10, 2005 at 12:20:29AM +0200, franz@fen.bilkent.edu.tr wrote:
> 
> hi,
> 
> I never used bnfnarrow before so I don't know whether
> I'm doing something stupid:
> 
>  f=x^3-x^2-234*x+729:nf=bnfinit(f):bnfnarrow(nf)
>  ***   non invertible matrix in gauss
> 
> The same command works with f = x^3 + x^2 - 54*x - 169,
> but not with x^3 + x^2 - 4*x + 1 (***   incorrect type in mattodiagonal)
> 
> franz
> 
> 
>     GP/PARI CALCULATOR Version 2.0.17 (beta)
>   Windows NT ix86 (ix86 kernel) 32-bit version

Your version is too old.  Check here 

ftp://megrez.math.u-bordeaux.fr/pub/pari/windows

for a newer version of prebuild executable.  

Karim, binary for 2.1.6 is not there.  Any plans to create one?

Igor