Re: Working modulo 2

*To*: mathgroup at smc.vnet.net*Subject*: [mg92110] Re: [mg92082] Working modulo 2*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Sat, 20 Sep 2008 04:59:34 -0400 (EDT)*Reply-to*: hanlonr at cox.net

poly = 7 + x + 4 y + 4 x y + 3 z + 2 x z + 4 y z + 4 x y z; PolynomialMod[poly, 2] x+z+1 Bob Hanlon ---- me13013 <me13013 at gmail.com> 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 -- Bob Hanlon