Organisers: Michel Balazard (CNRS, Laboratoire Poncelet) , Michael Tsfasman (CNRS, Laboratoire Poncelet, Institute for Information Transmission Problems) , Alexey Zykin (Laboratoire Poncelet, State University Higher School of Economics) . ... In this talk, we first motivate the study of zeta functions in families. Then we focus on the study of zeta functions in families of global fields and more specifically that of their logarithmic derivatives (joint work with A. Zykin). ...