FourierMatrix

FourierMatrix[n] returns an n×n Fourier matrix.

Examples

Create a 4×4 Fourier matrix:

FourierMatrix[4]

Display the matrix:

FourierMatrix[4] // MatrixForm

Verify orthogonality:

FourierMatrix[4] . ConjugateTranspose[FourierMatrix[4]] // Chop

Please visit the official Wolfram Language Reference for more details.