NAG Library Manual, Mark 30.1
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NAG CL Interface Introduction
Example description

nag_lapackeig_dspgv (f08tac) Example Program Results

Eigenvalues
       -2.2254     -0.4548      0.1001      1.1270

Estimate of reciprocal condition number for B
        5.8e-03

Error estimates for the eigenvalues
        4.7e-14     1.2e-14     5.6e-15     2.5e-14