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A SIMPLIFIED ORDINAL ANALYSIS OF FIRST-ORDER REFLECTION
The Journal of Symbolic Logic ( IF 0.5 ) Pub Date : 2020-10-23 , DOI: 10.1017/jsl.2020.23 TOSHIYASU ARAI
The Journal of Symbolic Logic ( IF 0.5 ) Pub Date : 2020-10-23 , DOI: 10.1017/jsl.2020.23 TOSHIYASU ARAI
In this note we give a simplified ordinal analysis of first-order reflection. An ordinal notation system $OT$ is introduced based on $\psi $ -functions. Provable $\Sigma _{1}$ -sentences on $L_{\omega _{1}^{CK}}$ are bounded through cut-elimination on operator controlled derivations.
中文翻译:
一阶反射的简化序数分析
在本说明中,我们对一阶反射进行了简化的序数分析。序数符号系统$OT$ 介绍基于$\psi $ -职能。可证明的$\西格玛_{1}$ - 上的句子$L_{\omega _{1}^{CK}}$ 通过对操作员控制的推导进行消减来限制。
更新日期:2020-10-23
中文翻译:
一阶反射的简化序数分析
在本说明中,我们对一阶反射进行了简化的序数分析。序数符号系统