Graph Signal Processing, Gsp, Signal Processing, Spectral Analysis, Fourier Transform.
than u1. If we plot the number of zero-crossings in eigenvectors u0, u1, …, uN-1 against the eigenvalues λ0, λ1, ….., λN-1, we will see a graph as follows. This shows that as λ increases, the number of zero-crossings in the corresponding eigenvector increases. So we can think that frequency varies