(3.7.5) Loos : Concerning point i) of contribution (3.7.4), different strategies have been followed. In ref. 440, Loos and Fromager constructed a weight-dependent LDA (correlation) functional for GOK DFT 422 using both finite and infinite uniform electron gases. This functional was employed to compute single and double excitations in one-dimensional systems. In ref. 441, Marut et al. designed, in the spirit of optimally-tuned rangeseparated hybrid functionals, a two-step system-dependent procedure (resulting in the construction of a weight-dependent exchange functional) to obtain accurate double excitations for twoelectron atomic and molecular systems. The transferability of these weight-dependent functionals remains questionable.