Journal
ACTA MATHEMATICA HUNGARICA
Volume 103, Issue 4, Pages 321-348Publisher
SPRINGER
DOI: 10.1023/B:AMHU.0000028832.47891.09
Keywords
observability; Riesz basis; semigroups; nonharmonic analysis; wave equation; Petrovsky system
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By applying the theory of semigroups, we generalize an earlier result of Komornik and Loreti [5] on the observability of compactly perturbed systems. As an application, we answer a question of the same authors concerning the observability of weakly coupled linear distributed systems.
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