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arXiv 1609.05433math.LO
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有限支撑迭代的协调系统

Coherent systems of finite support iterations

Vera Fischer, Sy D. Friedman, Diego A. Mejía, Diana C. Montoya

摘要:

我们引入了一种强制技术,通过对ccc偏序集的FS(有限支撑)迭代来构造三维的通用扩展数组,我们称之为3D-协调系统。我们用它们来产生新的星座模型在Chichoeli的图,特别是,一个模型,该图可以分为7个不同的值。此外,我们表明,这个星座的7个值是一致的存在一个$Δ^1_3$良好秩序的现实。

英文摘要:

We introduce a forcing technique to construct three-dimensional arrays of generic extensions through FS (finite support) iterations of ccc posets, which we refer to as 3D-coherent systems. We use them to produce models of new constellations in Cichoń's diagram, in particular, a model where the diagram can be separated into 7 different values. Furthermore, we show that this constellation of 7 values is consistent with the existence of a $Δ^1_3$ well-order of the reals.

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