NAG Library Manual, Mark 30.2
Interfaces:  FL   CL   CPP   AD 

NAG CL Interface Introduction
Example description
nag_sparseig_complex_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 )