for single-excitation wave functions. (The normalization condition is more complicated for other types of wave functions. ) An expression analogous to Eq. (4.10) has been suggested for l A→B , 175 yet this claim seems suspicious for all-electron TD-DFT calculations in nonorthogonal basis sets. Several other concepts introduced by Luzanov et al. in the context of the CT indices l A→B would seem to be rigorously valid only when the alternative definition Ω A→B is used instead. These include a gross excitation localization index (GLI),