In
physics and
systems theory, the
superposition principle, also known as
superposition property, states that, for all
linear systems, the net response at a given place and time caused by two or more stimuli is the sum of the responses which would have been caused by each stimulus individually. So that if input
A produces response
X and input
B produces response
Y then input (
A +
B) produces response (
X +
Y).