Nonlinear systems refer to mathematical models or systems of equations where the output is not directly proportional to the input. In contrast to linear systems, where a change in input produces a proportional change in output, nonlinear systems exhibit more complex behavior. Here are some key characteristics of nonlinear systems: 1. **Mathematical Representation**: Nonlinear systems can be described by nonlinear differential equations, polynomial equations, or other complex functions where the variables are raised to powers other than one or are multiplied together.
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