If you pull twice as hard on a spring, it stretches twice as far. However, when we introduce very large forces or complicated ...

Breaking inversion symmetry in materials allows deviations from Ohms law, enabling nonlinear effects that could drive future nano- and quantum-electronic devices.

In particular, we consider in some detail the REduced-rank Threshold AutoRegressive (RETAR) model whose nonlinear principal component process is a piecewise linear vector-valued function of past lags ...