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arXiv 1707.07593math.LO
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Baire性质的均匀性结果

Uniformity results on the Baire property

Vassilios Gregoriades

摘要:

我们关心的问题见证Baire财产的博雷尔和投影集(假设确定性)通过一个充分可定义的功能的代码。我们证明,在投影集的情况下,它是可以满足这几乎所有的代码使用连续函数。我们还表明,这是不可能的,以改善所有的代码,即使在代码中更复杂的功能是允许的。我们还研究了Borel层次的中间步骤,我们给出了一个估计的复杂性,这样的功能的代码,实际上所有的代码验证Baire属性。

英文摘要:

We are concerned with the problem of witnessing the Baire property of the Borel and the projective sets (assuming determinacy) through a sufficiently definable function in the codes. We prove that in the case of projective sets it is possible to satisfy this for almost all codes using a continuous function. We also show that it is impossible to improve this to all codes even if more complex functions in the codes are allowed. We also study the intermediate steps of the Borel hierarchy, and we give an estimation for the complexity of such functions in the codes, which verify the Baire property for actually all codes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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