Formal analysis presented in section 4 hints to the potential of the method, when it is applied to a chemical reaction. The energy formulas of the eq. 25 and 26 remain valid for any fixed configuration of the nuclei, if the stationary electron density function is found by solving the Schrödinger equation (under Born Oppenheimer approximation). Should that be a state of equilibrium (RS, TS, PS), the forces will vanish on every atom ( )