nag_complex_sparse_eigensystem_option (f12arc) Example Program Results
The 4 generalized Ritz values closest to ( 500.000 , 0.000 ) are:
1 ( 509.9390 , -0.0000 )
2 ( 380.9092 , -0.0000 )
3 ( 659.1558 , 0.0000 )
4 ( 271.9412 , 0.0000 )