Eigensystem Computation for Skew-Symmetric and a Class of Symmetric Matrices

An algorithm is described for computing the eigenvalues and (optionally) the eigenvectors of either a skew-symmetrm matrix or a symmetric tndiagonal matrix with constant diagonal The algomthm uses only orthogonal similarity transformations and is believed to be the most efficmnt procedure available for computmg all the elgenvalues or the complete elgensystem.