Encyclopedia of Complexity and Systems ScienceHundreds of articles on the mathematical and modeling basis for approaching complex systems, together with hundreds more on the progress using these tools in the fields of physics, econometrics, ecosystems, climate change, weather prediction, nanoelectronics, complex networks, quantum computing, chemistry, astrophysics, geophysics, systems biology, physical biology, bioinformatics, medicine, system dynamics, engineering, control and dynamical systems, and robotics as well as social, economics and political sciences.