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Rebuilding polygon from CoefficientList?
Hallo, I have a mixed polynomial poly in several variables vars. cl = CoefficientList[poly, vars] gives a multi-dimensional matrix of coefficients. Can anyone help with an algorithm/expression that re-constructs the original poly given cl and vars? (In practice, I'd like to manipulate the coefficients before reconstructing the polynomial; otherwise this wouldn't make sense). The algorithm must be able to handle any number of vars. I've found a solutions for a small and fixed number of vars using some ugly nested For loops. However, I suppose that there must be a more efficient solution using some cute matrix operations. Many thanks, Holger Holger Strauss Institute of Communication Acoustics Ruhr-University Bochum