Nonlinear theories Chaotic behavior in systems 12 Dynamics 11 System analysis 7 Mathematical analysis 5 Mathematical physics 5 Control theory 4 Estimation theory 4 Mathematics 4 Physics 4 Stochastic processes 4 Automatic control 3 Differentiable dynamical systems 3 Differential equations, Nonlinear 3 General 3 Mathematical models 3 Mathematical optimization 3 Nonlinear systems 3 System identification 3 Adaptive control systems 2 Algorithms 2 Biophysics 2 Complexity (Philosophy) 2 Differential equations 2 Digital filters (Mathematics) 2 Digital techniques 2 Econometrics 2 Elasticity 2 Functional analysis 2 Geometry, Differential 2