(2.2.7) Gritsenko : True, the shape of the accurate Dyson orbital of a primary ionization is very close to that of the corresponding accurate occupied Kohn-Sham orbital φ i obtained by "reverse engineering" from the correlated density. However, the same is true also for Dyson orbitals of the satellites of this ionization, reflecting the fact that Dyson orbitals are neither orthogonal to one another other nor normalized. This "unfortunate" feature of Dyson orbitals definitely hinders their comparison with other, "normally behaving" sets of orbitals.