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Recombining CoefficientList


CoefficientList[poly, {x1,x2,...,xn}] returns an array of coefficients
of the various powers of the xi in poly.  Has someone got a code segment
to recreate poly from the list of xi and the output?

Perhaps it would just be easier to make my own version that returns
an "tenser" that has Dimensions = {Exponent[x1], ... , Exponent[xn]}.

Scott Herod


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