Multiplication of Polynomials using Discrete Fourier Transformation
In this article we define the Discrete Fourier Transformation for univariate polynomials and show that multiplication of polynomials can be carried out by two Fourier Transformations with a vector multiplication in-between. Our proof follows the standard one found in the literature and uses Vandermonde matrices, see e.g. [27].
Accurate computations with Said–Ball–Vandermonde matrices
