ut: $x_i \approx x^*$\\
% \end{tabular}
% $$
%
%% 
% *Conjugate direction updates*
%
% The computation of $\beta_{i+1}$ in Step 7 above leads to different NCG
% methods. The update methods for $\beta_{i+1}$ available in Poblano are
% listed below. Note that the special case of $\beta_{i+1} = 0$ leads to
% the steepest descent method [3], which is available by specifying this
% update using the input parameter described in the <B_ncg_docs.html#9
% Method Specific Input Parameters> section below.
%%
%
% _Flet