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?
