(1) The Rockefeller University, New York, New York, 10021;(2) Fisica, Universitá di Roma, La Sapienza,, 00185 Rome, Italy
Abstract:
An attempt is made to clarify the difference between a theorem derived by Evans and Searles in 1994 on the statistics of trajectories in phase space and a theorem proved by the authors in 1995 on the statistics of fluctuations on phase space trajectory segments in a nonequilibrium stationary state.