The more interesting case is to use the adiabatic connection from a partially interacting system at finite µ > 0 to µ = ∞. One then obtains a hybrid lrWFT-srDFT model, which, for a sufficiently large µ, can describe nondynamical long-range correlations adequately and also give correct spin symmetry of openshell molecules 498 by means of a multi-determinant reference wave function. This approach is much simpler than attempting to describe them with a complicated Kohn-Sham DFA functional based on a single determinant. On the other hand, the dynamical short-range correlation effects can be described efficiently with a semilocal srDFT functional connecting to a Kohn-Sham DFT functional in the µ = 0 limit.