Eigenvector Matrix Cond. No. |
Compute the (2-norm) condition number of the
matrix of eigenvectors. |
Departure from Normality | This
option will compute Henrici's departure from normality for the
current matrix. This is defined to be the Frobenius norm of N
where N = T-diag(li), T is the Schur
factor of the matrix and diag(li) is the diagonal
of T. |
Numerical Abscissa |
Compute the numerical abscissa, the
rightmost point in the field of values. |
Pseudospectral Abscissa |
Compute (for a particular value of eps) the pseudospectral abscissa, the
real part of the rightmost point in the eps-pseudospectrum. |
Pseudospectral Radius |
Compute (for a particular value of eps) the pseudospectral radius, the
absolute value of the point with greatest modulus in the eps-pseudospectrum. |
Spectral Abscissa |
Compute the spectral abscissa, the
real part of the rightmost eigenvalue of the matrix. |
Spectral Radius |
Compute the spectral radius, the
absolute value of the eigenvalue with greatest modulus. |
Display Points | When this option is
toggled on, the points in the complex plane at which the above numbers
are attained, if appropriate, are marked on the pseudospectra
plot. When this item is toggled off, any existing points are removed,
and no more will be plotted until it is toggled again. |