ZGEESX Example

To find the Schur factorization of the matrix

A = $$\left(\vphantom{ \begin{array}{rrrr} -3.97 - 5.04i & -4.11 + 3.... ...1.10 + 0.82i & 1.81 - 1.59i & 3.25 + 1.33i & 1.57 - 3.44i \end{array} }\right.$$$$\begin{array}{rrrr} -3.97 - 5.04i & -4.11 + 3.70i & -0.34 + 1.01... ...i \\ -1.10 + 0.82i & 1.81 - 1.59i & 3.25 + 1.33i & 1.57 - 3.44i \end{array}$$$$\left.\vphantom{ \begin{array}{rrrr} -3.97 - 5.04i & -4.11 + 3.... ...1.10 + 0.82i & 1.81 - 1.59i & 3.25 + 1.33i & 1.57 - 3.44i \end{array} }\right)$$,

such that the eigenvalues A with positive real part of are the top left diagonal elements of the Schur form, T. Estimates of the condition numbers for the selected eigenvalue cluster and corresponding invariant subspace are also returned.

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