Short-range behavior of some electron-pair densities

► The short-range behavior of several electron-pair densities is governed by ρ2(0, 0) in common. ► The two-electron ρ2(0, 0) is exactly determined by the single-electron ρ(0) in the Hartree-Fock theory. ► The effect of electron correlation on the above relation is discussed for some light atoms.