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In control theory, it is often required to check if a nonautonomous system is stable or not. To cope with this it is necessary to use some special comparison functions. Class functions belong to this family: Definition: a continuous function is said to belong to class if: * it is strictly increasing; * it is s.t. . Definition: a continuous function is said to belong to class if: * it belongs to class ; * it is s.t. ; * it is s.t. . ==See also== * H. K. Khalil, Nonlinear systems, Prentice-Hall 2001. Sec. 4.4 - Def. 4.2. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「class kappa function」の詳細全文を読む スポンサード リンク
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