 tapers and use 
them in the integral equation in the frequency domain 
(dpss_ev subroutine) to get the eigenvalues more accurately, 
by performing Chebychev Gaussian Quadrature following Thomson’s codes.</p>
<p>First, we create the main and off-diagonal vectors of the 
tridiagonal matrix. We compute separetely the even and odd tapers, 
by calling eigh_tridiagonal from SCIPY.</p>
<p>We, refine the eigenvalues, by computing the inner bandwidth 
energy in the frequency domain (eq. 2.6 Thomson). Also the “