Note that all diagonal terms of Equation 24 are equal to 0, irrespective of whether we calculate J(r) in an AO-or MObasis. It is perhaps most clearly seen from Equation where [ψi(r)∇ψj(r ′ ) -ψj(r ′ )∇ψi(r)] r=r ′ = 0 when i = j. Thus, viewed from an AO perspective, it is rarely the case that ∇ψ is multiplied with an AO of the same type. For example, the F(x, y, z) from an s-orbital might gain a node by being multiplied with a p-orbital or the F(x, y, z) of a p-orbital might maintain its node-spanning vector field because it is multiplied with an s-orbital. The same type of interactions are also present if we change to an MO basis, though more complex.