where $h$ is
\begin{equation}
h(i)  = \frac{{\bf p_i^2}}{2m} - \frac{e^{2}}{4\pi\epsilon_{0}}
\frac{Z}{r} + u_{HF}(i).
 \end{equation}%%                                                  %   8
The last term, $u_{HF}(i)$ is called the Hartree-Fock potential.