NAG Library Manual, Mark 28.7
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NAG CL Interface Introduction
Example description

nag_quad_dim1_inf_general (d01rmc) Example Program Results

a        -     lower limit of integration =      0.0000
b        -     upper limit of integration =    infinity
epsabs   -    absolute accuracy requested =    0.00e+00
epsrel   -    relative accuracy requested =    1.00e-04
maxsub   - maximum number of subintervals =          20

result   -  approximation to the integral =      3.1416
abserr   - estimate of the absolute error =    2.65e-05
iinfo(0) -    number of subintervals used =          10