§4.2, p. 38 — the Fourier basis vectors are eigenvectors of S, Sφ_k = e^{−2πik/n} φ_k, with root-of-unity eigenvalues

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§4.2, p. 38 — the Fourier basis vectors are eigenvectors of S, Sφ_k = e^{−2πik/n} φ_k, with root-of-unity eigenvalues · Prove2Me