held at the Center for Interdisciplinary Research (ZiF) of Bielefeld University (December 16-20, 1991). The theme of the conference was"Dynamics of Complex and Irregular Systems", It was attended by about 60 mathematicians and theoretical physicists representing 18 research institutions in France and Germany and working on various aspects and problems connected with the dynamics of complex and irregular systems. The papers presented cover a number of different aspects of Stochastic Analysis, Probability Theory, Quantum Field Theory, Functional Integration, Ergodic Theory, Quantum Theory, Statistical Modelling, Random Graph Theory and Percolation Theory.