Take the tour ×  The direct evaluation of the configurational
partition function of a liquid is very difficult because of the
complicated dependence of the potential energy in the liquid.For
this reason a formalism of distribution function or correlation
function is conveniently adopted in the liquids.  Where the
correlation function is written as $ h(R)=g(R)^s-1\ $. and again
correlation function written as a dimensionless function as $
g^{(s)}$ = $\large \frac{n^{(s)}}{n^s}$.  In the right hand side
of this equation, why do we use brackets in the power of the
nominator but do not use brackets in the power of denominator?
share|improve this question It would help if you provide some
reference for that notation. I don't get what the exponent in
the first formula means. Further, you mention "direct
correlation function" in the title, but it's not in the question
body. –  leonbloy Jan 4 at 17:03 BTW, your $g(R)$ is this:
en.wikipedia.org/wiki/Radial_distribution_function –  leonbloy
Jan 4 at 17:08 add comment