Abstract
A new theory of self-diffusion in simple liquids is outlined. Dynamical superposition is assumed and then it is shown that with no further approximations the self-diffusion coefficient can be computed if the functional form of the equilibrium pair correlation function g(r) is known. The result is formally equivalent to that found in the theory of dilute gases with the potential of mean force, ω(r)=−lng(r), taking the place of the intermolecular potential.