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Higher Order Tsirelson Spaces and their Modified Versions are Isomorphic

Hung Viet ChuThomas Schlumprecht
Jan 2024
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摘要原文
We prove that for every countable ordinal $\xi$, the Tsirelson's space $T_\xi$ of order $\xi$, is naturally, i.e., via the identity, $3$-isomorphc to its modified version. For the first step, we prove that the Schreier family $\mathcal{S}_\xi$ is the same as its modified version $ \mathcal{S}^M_\xi$, thus answering a question by Argyros and Tolias. As an application, we show that the algebra of linear bounded operators on $T_\xi$ has $2^{\mathfrak c}$ closed ideals.
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