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NAG Library Manual, Mark 27.2
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NAG CL Interface Introduction
Example description
nag_ode_bvp_ps_lin_cgl_deriv (d02udc) Example Program Results

Original function f and numerical derivative fx

       x          f         fx
    0.0000     1.0000     1.0000
    0.0144     1.0145     1.0143
    0.0571     1.0587     1.0555
    0.1264     1.1341     1.1187
    0.2197     1.2421     1.1972
    0.3333     1.3832     1.2835
    0.4630     1.5554     1.3706
    0.6037     1.7542     1.4532
    0.7500     1.9724     1.5276
    0.8963     2.2007     1.5919
    1.0370     2.4285     1.6455
    1.1667     2.6448     1.6886
    1.2803     2.8386     1.7221
    1.3736     3.0004     1.7468
    1.4429     3.1221     1.7638
    1.4856     3.1975     1.7736
    1.5000     3.2231     1.7769