You can use dictionaries, like this:
sage: R.<x,y> = PolynomialRing(GF(2),2,'xy')
sage: coeffs = {(1, 0): 1, (1, 1): 1}
sage: R(coeffs)
x*y + x
On Thu, Feb 5, 2009 at 12:31 PM, Christophe Oosterlynck
<tif...@gmail.com> wrote:
>
> Hi,
>
> is there a way to construct a polynomial using a coefficient vector?
> If I construct a polynomial ring ( R = BooleanPolynomialRing(5,'x') ),
> I want to be able to construct, for example, a polynomial "x0 +x0*x1"
> by using the coefficients vector [0,1,0,0,0,0,1,0,0,0,0 ... ]
>
> thanks
>
> >
>
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