Stability of linear infinite-dimensional systems revisited |
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Authors: | K MACIEJ PRZYLUSKI‡ |
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Affiliation: | Institute of Mathematics, Polish Academy of Sciences , Sniadeckich 8, P.O. Box 137, 00-950 Warszawa, Poland |
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Abstract: | The paper is devoted to a study of stability questions for linear infinite-dimensional discrete-time and continuous-time systems. The concepts of power stability and l p Instability for a linear discrete-time system x k+1 = Ax k (where x k ε X, X is a Banach space, A is linear and bounded) are introduced and studied. Relationships between these concepts and the inequality r(A) < 1, where r(A) denotes the spectral radius of A, are also given. The discrete-time results are used for a simple derivation of some well-known properties of exponentially stable and Lp-stable linear continuous-time systems described by xdot](t) = Ax(t) (A generates here a strongly continuous semigroup of linear and bounded operators on X). Some remarks on norms related to stable systems are also included. |
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