Abstract
We investigate admissible observation operators. Semigroup criteria of admissibility are derived. We also discuss the recent Russell-Weiss necessity condition of exact observability.
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This work was done when the first author was on leave from: Institute of Automatics Academy of Mining and Metallurgy al. Mickiewicza 30/B1, rm.314 PL-30-059 Cracow, Poland
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Grabowski, P., Callier, F.M. Admissible observation operators. Semigroup criteria of admissibility. Integr equ oper theory 25, 182–198 (1996). https://doi.org/10.1007/BF01308629
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DOI: https://doi.org/10.1007/BF01308629