The study of linear systems is far easier than that of nonlinear systems. General information on the behaviour of the system can be drawn in the first case, while the results obtained studying nonlinear systems are usually applicable only to a given set of conditions.
Many actual systems show a behaviour that can be modelled as being linear, at least in a broad range of conditions.
Even if a system is essentially nonlinear, it is possible, with a few exceptions, to linearize its behaviour for very small variations of its state in the vicinity of given conditions. In such case the advantages in 1 can be exploited and a general solution for the behaviour in the small can be obtained.
KeywordsSine Tate Librium Folk Plague
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