(3.6.8) Gori-Giorgi : Kohn-Sham DFT that uses SCE limit (see contributions (2.4.5) and (4.5.8)) to approximate the exchange-correlation functional is able to stretch the H 2 molecule without spin symmetry breaking. The SCE functional is also able to capture charge localization in very low-density systems without spatial symmetry breaking. However, the SCE functional is a very nonlocal approximation to the exchangecorrelation functional (which is exact in a certain limit) and, at present, rather involved to evaluate. It also strongly overestimates correlation, so that a better strategy could be to design functionals that are inspired by the mathematical SCE structure but simplify and renormalize it. Apart from the reasons mentioned in contribution (3.6.2), further efforts to avoid symmetry breaking might be worthwhile in order to obtain potential-energy surfaces without kinks.