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Abstract manipulation of symbols. Transforming an algebraic expression into the desired form.

2
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A slick way is to use the Newton-Girard formulae in conjunction with the handy RootSum[] function: Solve[Table[s[m] == RootSum[Function[x, x^3 + b x^2 + c x + d], Functio …
answered May 5 '16 by J. M. will be back soon
5
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As it turns out, there's an (undocumented) function eminently suitable for the task: poly = -1 + x + x^2 - x^4 + x^6 + x^9 - x^10; PolynomialMod[Algebra`PolynomialPowerMod`PolynomialPowerMod[poly …
answered Jun 5 '13 by J. M. will be back soon