SRB states and nonequilibrium statistical mechanics close to equilibrium
  Nonequilibrium statistical mechanics close to equilibrium is studied using SRB states and a formula for their derivatives with respect to parameters. We write general expressions for the thermodynamic fluxes (or currents) and the transport coefficients, generalizing previous results. In this framework we give a general proof of the Onsager reciprocity relations. 
Giovannni Gallavotti (Dipartimento di Fisica, Universita' di Roma),   David Ruelle (IHES, Bures sur Yvette)