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arXiv 0810.4086math.LO
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关于希尔伯特空间和概率代数的扰动

On perturbations of Hilbert spaces and probability algebras with a generic automorphism

Itaï Ben Yaacov, Alexander Berenstein

摘要:

我们证明了$IHS_A$,理论的无穷维希尔伯特空间配备了一个通用的自同构,是$\aleph_0$-稳定的扰动的自同构,并承认素模型扰动的任何一组。类似地,$APr_A$,无原子概率代数的理论配备了一般的自同构是$\aleph_0$-稳定的扰动。然而,不允许扰动,它甚至不是超稳定的。

英文摘要:

We prove that $IHS_A$, the theory of infinite dimensional Hilbert spaces equipped with a generic automorphism, is $\aleph_0$-stable up to perturbation of the automorphism, and admits prime models up to perturbation over any set. Similarly, $APr_A$, the theory of atomless probability algebras equipped with a generic automorphism is $\aleph_0$-stable up to perturbation. However, not allowing perturbation it is not even superstable.

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