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**On the componentwise stability of linear systems.**
*(English)*
Zbl 1056.93054

Summary: The componentwise asymptotic stability (CWAS) and componentwise exponential asymptotic stability (CWEAS) represent stronger types of asymptotic stability, which were first defined for symmetrical bounds constraining the flow of the state-space trajectories, and then, were generalized for arbitrary bounds, not necessarily symmetrical. Our paper explores the links between the symmetrical and the general case, proving that the former contains all the information requested by the characterization of the CWAS/CWEAS as qualitative properties. Complementary to the previous approaches to CWAS/CWEAS that were based on the construction of special operators, we incorporate the flow-invariance condition into the classical framework of stability analysis. Consequently, we show that the componentwise stability can be investigated by using the operator defining the system dynamics, as well as the standard \(\varepsilon\)-\(\delta\) formalism. Although this paper explicitly refers only to continuous-time linear systems, the key elements of our work also apply, mutatis mutandis, to discrete-time linear systems.

### MSC:

93D20 | Asymptotic stability in control theory |

### Keywords:

linear systems; asymptotic stability; componentwise (exponential) asymptotic stability; time-dependent invariant sets
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\textit{O. Pastravanu} and \textit{M. Voicu}, Int. J. Robust Nonlinear Control 15, No. 1, 15--23 (2005; Zbl 1056.93054)

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### References:

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