Time dependent correlation functions and mode-mode coupling theories

We critically discuss the various tools and methods which are used to describe the role of long wave length hydrodynamical processes in the analysis of time-dependent correlation functions. We also review the various physical problems (long time behavior of Green-Kubo integrands, 2 dimensional hydrodynamics, transport properties of the Van der Waals fluid, critical phenomena .) where these methods have received fruitful applications. © 1975.SCOPUS: re.j