Within
computational chemistry, the
Slater–Condon rules express integrals of one- and two-body operators over
wavefunctions constructed as
Slater determinants of
orthonormal orbitals in terms of the individual orbitals. In doing so, the original integrals involving
N-electron wavefunctions are reduced to sums over integrals involving at most two molecular orbitals, or in other words, the original 3
N dimensional integral is expressed in terms of many three- and six-dimensional integrals.