  We illustrate some of the static and dynamic relations discovered by Cohen,
Crooks, Evans, Jarzynski, Kirkwood, Morriss, Searles, and Zwanzig. These
relations link nonequilibrium processes to equilibrium isothermal free energy
changes and to dynamical path probabilities. We include ideas suggested by
Dellago, Geissler, Oberhofer, and Schoell-Paschinger. Our treatment is intended
to be pedagogical, for use in an updated version of our book: Time
Reversibility, Computer Simulation, and Chaos. Comments are very welcome.
