NAG Library Manual, Mark 30.2
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NAG CL Interface Introduction
Example description

nag_lapackeig_dspgvx (f08tbc) Example Program Results

Number of eigenvalues found =    2

 Eigenvalues
     -0.4548   0.1001
 Selected eigenvectors
            1          2
 1      1.0000     1.0000
 2      1.7303     0.0830
 3     -1.1354    -0.1129
 4     -2.0169    -1.0611