Not a linear function of the relevant variables.
Fr.: dispositif non-linéaire
An electronic device whose output is not directly proportional to its input. For example, in a → diode the current is a nonlinear function of the voltage; its voltage-current characteristics do not obey → Ohm's law.
Fr.: dynamique non-linéaire
Same as → chaos.
Fr.: instabilité non-linéaire
The instability of a physical or mathematical system that arises from the nonlinear nature of relevant variables and their interactions within the system.
Fr.: système non-linéaire
A system in which small changes can result in large effects, and large changes in small effects.
The property, condition, or state of being → nonlinear.