(3.7.8) Fromager : I would like to complement the discussion in sections (3.7.4), (3.7.6), and (3.7.7) from the perspective of state-averaged (usually multiconfigurational) wave-functionbased methods. The incorporation of ensemble-weight dependencies into DFAs is probably the most challenging task in ensemble DFT. Defining Hartree, exchange, and correlation ensemble energies is not as straightforward as in regular ground-state DFT. Various decompositions have actually been proposed. They all have their advantages and drawbacks. A dilemma already appears at the Hartree-only level of approximation. In the original formulation of GOK 422 and N-centred 423 ensemble DFTs, the ensemble Hartree energy is evaluated from the regular ground-state Hartree density functional 39) as follows: