Linear, Nonlinear, and Complex Systems

Outline: In this chapter readers will be introduced to basic ideas and definitions of system theory, nonlinearity, nonlinear deterministic systems, and complexity. It will include examples and some hints to statistical and geometrical methods. This chapter is not essential for the clinical part of the book, but it is meant to offer a deeper understanding of the concepts of time series analysis, especially for nonlinear methods. We therefore recommended reading it.