Invariant subspaces for Fréchet spaces without continuous norm
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- by Quentin Menet PDF
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Abstract:
Let $(X,(p_j))$ be a Fréchet space with a Schauder basis and without continuous norm, where $(p_j)$ is an increasing sequence of seminorms inducing the topology of $X$. We show that $X$ satisfies the Invariant Subspace Property if and only if there exists $j_0\ge 1$ such that $\ker p_{j+1}$ is of finite codimension in $\ker p_{j}$ for every $j\ge j_0$.References
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Additional Information
- Quentin Menet
- Affiliation: Département de Mathématique, Université de Mons, 20 Place du Parc, 7000 Mons, Belgique
- MR Author ID: 962506
- ORCID: 0000-0002-9334-1837
- Email: quentin.menet@umons.ac.be
- Received by editor(s): October 15, 2020
- Received by editor(s) in revised form: November 20, 2020
- Published electronically: May 12, 2021
- Additional Notes: The author is a Research Associate of the Fonds de la Recherche Scientifique - FNRS and was supported by the grant ANR-17-CE40-0021 of the French National Research Agency ANR (project Front)
- Communicated by: Javad Mashreghi
- © Copyright 2021 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 149 (2021), 3379-3393
- MSC (2020): Primary 47A15, 47A16
- DOI: https://doi.org/10.1090/proc/15418
- MathSciNet review: 4273142