In other words, the eigenvalues of diag( λ 1.
The resulting equation is known as eigenvalue equation and used to derive the characteristic polynomial and, further, eigenvalues and eigenvectors. Elements of the main diagonal can either be zero or nonzero. In linear algebra, a diagonal matrix is a matrix in which the entries outside the main diagonal are all zero the term usually refers to square matrices.
Matrix whose only nonzero elements are on its main diagonal
