Mapping from (i, j) in Hessian of fg(x) to Ipopt sparsity structure.
i = 0 , ... , n_-1, index_hes_fg_[i] is a standard map from column index values
j to the corresponding index in the Ipopt sparsity structure for the Hessian of the Lagragian.
Definition at line 910 of file cppad_ipopt_nlp.hpp.
Referenced by cppad_ipopt_nlp(), and eval_h().