This figure shows the dpss's associated associated with the 8 large eigenvalues of the concentration problem. The left panel shows the time domain sequences, where N = 1000 and NW = 4, and the right panel shows the squared magnitude of their Fourier transform. Note that most of the density under the curves in the right panel is on the interval (-W,W), or (-1/250,1/250), and all of the mass in the curves in the left panel are on the integers from 0 to N-1.