• delocalization within the basin Ωi is treated just as the localization on a given atom, which contradicts the physical definition of electron delocalization. where the Gaussian kernel g(⃗ r, ⃗ r ′ ; l) is given in a following way chosen in such a way that 0 ⩽ EDR(⃗ r, u) ⩽ 1 is always bounded. Using EDR we can easily investigate the various delocalization degrees of electrons in a given molecule. For instance, let us take a look at naphtalene (Fig. ). The advantages of EDR method are as follow: