2
$\begingroup$

Which topic(s) does this matrix come from? What is the name of this matrix?

$$\pmatrix{1&1&1\\1&\omega&\omega^2\\1&\omega^2&\omega}$$

  • 10
    That's a Vandermonde matrix, as well as the matrix of the discrete Fourier transform of size $3$... It is not quite clear what the purpose of this question is, though!2012-02-10
  • 2
    We are assuming that $\omega$ here is a root of unity, of course (too bad OP did not define his/her notation)... if not, then it's just some symmetric matrix.2012-02-10

1 Answers 1