Four-body function

$g_{N}^{(4)}(r_{1},r_{2},r_{3},r_{4})={\frac {g_{N}^{(3)}(r_{1},r_{2},r_{3})g_{N}^{(3)}(r_{1},r_{2},r_{4})g_{N}^{(3)}(r_{2},r_{3},r_{4})g_{N}^{(3)}(r_{1},r_{3},r_{4})}{g_{12}g_{13}g_{14}g_{23}g_{24}g_{34}}}$

See also

• Kirkwood superposition approximation

References

1. Yong-Teh Lee, Francis H. Ree and Taikyue Ree "Distribution Function of Classical Fluids of Hard Spheres. I", Journal of Chemical Physics 48 pp. 3506-3516 (1968)