Re: Working modulo 2

• To: mathgroup at smc.vnet.net
• Subject: [mg92093] Re: [mg92082] Working modulo 2
• From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
• Date: Sat, 20 Sep 2008 04:56:21 -0400 (EDT)
• References: <200809190956.FAA16536@smc.vnet.net>

PolynomialMod[7 + x + 4 y + 4 x y + 3 z + 2 x z + 4 y z + 4 x y z, 2]
x + z + 1

Andrzej Kozlowski

On 19 Sep 2008, at 18:56, me13013 wrote:

> Howdy,
>
> How does one reduce a polynomial's coefficients modulo 2?  For
> example, I have a function that sums several polynomials, and
> currently produces a result like this:
>  7 + x + 4 y + 4 x y + 3 z + 2 x z + 4 y z + 4 x y z
> I want to reduce this to
>  1 + x + z
>
> I thought I might be able to do this by somehow coercing the terms
> into a list and then doing Sum[L[[i]],{i,1,Length[L]},Modulus->2], but
> no such luck.
>
> Any ideas?
>
> Thanks,
> Bob H
>

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