Is there a special routine in LAPACK to diagonalize complex SYMMETRIC matrices? The Section on "Symmetric Eigenproblems" in the Documentation always assumes either real symmetric or complex HERMITIAN matrices. What to do in the case of complex symmetric matrices? Just use the "Singular Value Decomposition"? I need the singular values and the left matrix of the singular value decomposition of a 3x3 matrix, but I thought the program might perform better if I use a routine that exploits the symmetry of the matrix and therefore I am looking for the above mentioned routine.