Complex Systems

This special topic issue of 'ComPlexUs' contains selected papers presented at the European Conference on Complex Systems (ECCS'05) which took place in Paris in November 2005. Complex systems are networks of interactive entities that are studied through a rapidly increasing mass of data in all scientific disciplines. At the same time, these disciplines share a lot of new and fundamental theoretical questions. This situation is particularly favorable for developing the new science of complex systems in an interdisciplinary way. As the first in a series of major annual conferences on complex systems research, the ECCS'05 provided an overview of the many fields of interest contributing to the growth of this rapidly developing interdisciplinary science. Mathematicians, physicists, computer scientists, and investigators in biology and sociology will appreciate the wealth of interesting new findings and theories from the cutting edge of complex systems research collected in this issue.