Mak Trifkovic on Thu, 25 Aug 2005 01:38:56 +0200


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Re: rnfinit error


\v says

 GP/PARI CALCULATOR Version 2.2.10 (alpha)
i686 running linux (ix86 kernel) 32-bit version compiled: Jul 8 2005, gcc-3.3.3 20040412 (Red Hat Linux 3.3.3-7) (readline v4.3 enabled, extended help available)




On Wed, 24 Aug 2005, Igor Schein wrote:

On Wed, Aug 24, 2005 at 03:22:32PM -0400, Mak Trifkovic wrote:
I do the following:

K=bnfinit(a^4 - 3*a^2 + 71);

L=rnfinit(K,x^5 + Mod(a - 1, a^4 - 3*a^2 + 71)*x^4 + Mod(2/5*a^2 + 2/5,
a^4 - 3*a^2 + 71)*x^3 + Mod(2/5*a^2 - 3/5, a^4 - 3*a^2 + 71)*x^2 +
Mod(1/5*a^3 - 1/5*a^2 - 4/5*a + 19/5, a^4 - 3*a^2 + 71)*x + Mod(-1/5*a^2 +
a - 11/5, a^4 - 3*a^2 + 71))

and get the error message

  *** rnfinit: reducible modulus in factornf.

What's wrong?  (both polynomials are irreducible)

Mak

Can you please provide output of \v?  I can't reproduce this problem
with either 2.1.5 or 2.2.10.

Igor