For generality, the following EDA expressions will include the dimer corrections δE HF,AB but these might be omitted for nonpolar systems, in the interest of cost, or evaluated using a smaller basis set as compared to the monomer wavefunctions and SAPT corrections. Using the notation introduced above, a many-body generalization of the two-body XSAPT-EDA in Eq. ( ) can be expressed as 36,37