I have question about
LAPACK. I calculate eigenvalues of a $16\times16$ Hermitian complex matrix with small entries by
ZHEEV subroutine, but the size of eigenvalues are very large! May it possible?
Trace in the initial matrix is of the order
1E-17 and summation of eigenvalues is of the order of
1E-12. Info is "0" and work is large enough. When I try this program with small dimension eigenvalues is small.
Usually what kind of mistakes may cause this kind of problem?! Thanks for time you spent