Example program for zunmhr

This example computes all the eigenvalues of the matrix A, where
A = -3.97-5.04i -4.11+3.70i -0.34+1.01i 1.29-0.86i 0.34-1.50i 1.52-0.43i 1.88-5.38i 3.36+0.65i 3.31-3.85i 2.50+3.45i 0.88-1.08i 0.64-1.48i -1.10+0.82i 1.81-1.59i 3.25+1.33i 1.57-3.44i ,  
and those eigenvectors which correspond to eigenvalues λ such that Reλ<0. Here A is general and must first be reduced to upper Hessenberg form H by zgehrd. The program then calls zhseqr to compute the eigenvalues, and zhsein to compute the required eigenvectors of H by inverse iteration. Finally zunmhr is called to transform the eigenvectors of H back to eigenvectors of the original matrix A.