Abstract
We study finite dimensional perturbations of shift operators and their membership to the classes A m, n appearing in the theory of dual algebras. The results obtained yield informations about the lattice of invariant subspaces via the techniques of Scott Brown.
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Benhida, C., Timotin, D. Functional models and finite dimensional perturbations of the shift. Integr equ oper theory 29, 187–196 (1997). https://doi.org/10.1007/BF01191428
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DOI: https://doi.org/10.1007/BF01191428