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Proof-theoretic strengths of the well-ordering principles
Archive For Mathematical Logic ( IF 0.3 ) Pub Date : 2019-07-30 , DOI: 10.1007/s00153-019-00689-4
Toshiyasu Arai

In this note the proof-theoretic ordinal of the well-ordering principle for the normal functions \(\mathsf {g}\) on ordinals is shown to be equal to the least fixed point of \(\mathsf {g}\). Moreover corrections to the previous paper (Arai in Arch Math Log 57:649–664, 2017) are made.

中文翻译:

排序规则原理的证明理论优势

在此注释中,普通函数\(\ mathsf {g} \)的正序原理的证明理论序数显示为等于\(\ mathsf {g} \)的最小不动点。此外,对前一论文(Arai在Arch Math Log 57:649–664,2017年)中进行了更正。
更新日期:2019-07-30
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