Exponentially modified Gaussian distribution: Difference between revisions
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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 function | comparison functions]]. Class <math>\mathcal{K}</math> functions belong to this family: | |||
'''Definition''': A continuous function <math>\beta : [0, a) \times [0, \infty) \rightarrow [0, \infty)</math> is said to belong to class <math>\mathcal{KL}</math> if: | |||
* for each fixed <math>s</math>, the function <math>\beta(r,s)</math> belongs to [[class kappa function | class kappa]]; | |||
* for each fixed <math>r</math>, the function <math>\beta(r,s)</math> is decreasing with respect to <math>s</math> and is s.t. <math>\beta(r,s) \rightarrow 0</math> for <math>s \rightarrow \infty</math>. | |||
==See also== | |||
* H. K. Khalil, Nonlinear systems, Prentice-Hall 2001. Sec. 4.4, Def. 4.3. | |||
[[Category:Control theory]] |
Revision as of 04:41, 10 December 2013
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:
- for each fixed , the function belongs to class kappa;
- for each fixed , the function is decreasing with respect to and is s.t. for .
See also
- H. K. Khalil, Nonlinear systems, Prentice-Hall 2001. Sec. 4.4, Def. 4.3.