I'm not at my computer to check, but maybe ratsimpmodprime is what you want.
Aaron Meurer On Nov 26, 2012, at 5:24 AM, Simon Burton <[email protected]> wrote: > Hi, > > I am using the groebner basis, reduce, etc. for working > with polynomials in roots of unity. Eg. If w is a third > root of unity then: > >>>> import sympy as sy >>>> w = sy.symbols("w") >>>> p = w**2 + w + 1 >>>> basis = sy.groebner([p]) > > now we can work out polynomials in w: > >>>> q = w**5 + w + 2 >>>> _, q = basis.reduce(q) >>>> q > 1 > > (And this generalizes to polynomials with multiple different > roots of unity.) > > Ok, so this is all very cool, I finally found a use for > groebner bases, but it occurs to me that there might be a simpler > way of achieving this? > > Simon. > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/sympy?hl=en. > -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
