I get this formula in a MD paper:Wavelet-based multi-scale coarse graining approach for DNA molecules P(d)=A*exp(-U(d)/kT) P(d) is the distribution function, U(d) is the potentital. How does this formula come? In the paper I read about this, they get the distribution first, and obtain the potential from the distribution by using this formula. Does that make sense? Really need someone's help. Thank you!