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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



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