A state variable is one of the set of variables that are used to describe the mathematical "state" of a dynamical system. Intuitively, the state of a system describes enough about the system to determine its future behaviour. Models that consist of coupled first-order differential equations are said to be in state-variable form.
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Famous quotes containing the words state and/or variable:
“For I have learned, in whatsoever state I am, therewith to be content.”
—Bible: New Testament St. Paul, in Philippians, 4:11.
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Whose rutty bank, the which his river hems,
Was painted all with variable flowers,”
—Edmund Spenser (1552?–1599)