You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: gentev.m
    path of file: ./repos/2D_3D_PolarFourierTransform/MATLAB CodeBase/BTTBSystemsStudy
    
    the code of the file until where you have to start completion: function [ tev ] = gentev( t )

    
function [ tev ] = gentev( t )
% gentev computes eigenvalues of the BCCB matrix in which the BTTB T_{mn}
% is embedded:
% t : the matrix generated by fcolrow.a see A.9 ;
% tev : the output eigenvalues of the BCCB matrix

tev = fft2 (t);
end