Volterra series

The Volterra series is a mathematical framework used to represent nonlinear systems in terms of their input-output relationships. Named after the Italian mathematician Vito Volterra, this series generalizes the concept of a Taylor series to handle nonlinear dynamics. ### Key Concepts: 1. **Nonlinearity**: Unlike linear systems, where output is directly proportional to input, nonlinear systems exhibit more complex behaviors. The Volterra series captures these nonlinearities systematically.