This example reorders the Schur factorization of the matrix $A=QT{Q}^{\mathrm{T}}$ such that the two real eigenvalues appear as the leading elements on the diagonal of the reordered matrix $\tilde{T}$, where and

The example program for dtrsen illustrates the computation of error bounds for the eigenvalues.

The original matrix $A$ is given in dorghr.