Jean Bricmont, "From the microscopic to the macroscopic world"

Most of the talk will be devoted to an explanation of the relationship between the microscopic and the macroscopic descriptions of the world and, in particular, of Boltzmann's resolution of the tension between the reversible character of the first description and the irreversible character of the second. We will also discuss simple models, where some progress can be made towards a rigorous derivation of a basic macroscopic law, namely Fourier's law.