nag::ad::e01bg Tangent Over Adjoint Example Program Results Derivatives calculated: Second order adjoints Computational mode : algorithmic fint = 9.666778e-02 dint = 2.009028e-01 Sum of all Hessian elements of (fint, dint) w.r.t. interpolation point xint : sum_i [d^2(fint, dint) / d(xint)^2]_i = 4.287986e+00