Eigenvectors of a 2n x 2n Matrix It has been known that the eigenvalues of a certain 2n x 2n matrix can be obtained by use of two smaller matrices of order n which can be easily constructed. An algorithm is given to obtain the eigenvectors of the 2n x 2n matrix by use of the eigenvectors of the smaller matrices. CACM December, 1967 Charmonman, S. CA671207 JB February 26, 1978 2:22 PM 1501 5 1501 1501 5 1501 1501 5 1501