Editing Linear system (section)

{{Short description|Physical system satisfying the superposition principle}}
{{About|the systems theory concept|the linear algebra concept|System of linear equations|the algebraic geometry concept|Linear system of divisors|the tactical formation|Line (formation)}}
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In [[systems theory]], a '''linear system''' is a [[mathematical model]] of a [[system]] based on the use of a [[linear operator]].
Linear systems typically exhibit features and properties that are much simpler than the [[nonlinear]] case.
As a mathematical abstraction or idealization, linear systems find important applications in [[automatic control]] theory, [[signal processing]], and [[telecommunications]]. For example, the propagation medium for wireless communication systems can often be
modeled by linear systems.