Propagation of partial randomness

Propagation of partial randomness
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DOI:
10.1016/j.apal.2013.10.006
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发表时间:
2013-11
期刊:
Ann. Pure Appl. Log.
影响因子:
--
通讯作者:
Kojiro Higuchi;W. M. P. Hudelson;S. G. Simpson;K. Yokoyama
Kojiro Higuchi;W. M. P. Hudelson;S. G. Simpson;K. Yokoyama
中科院分区:
其他
文献类型:
--
作者:
Kojiro Higuchi;W. M. P. Hudelson;S. G. Simpson;K. Yokoyama

文献摘要

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令 f 为从 0 和 1 的有限序列到实数的可计算函数。我们证明,强 f 随机性意味着相对于 PA 度而言,强 f 随机性。我们还证明:如果 X 是强 f 随机的,并且图灵可约简到 Y,其中 Y 相对于 Z 是 Martin-Löf 随机的,那么 X 相对于 Z 是强 f 随机的。此外,我们还证明了其他部分随机性概念的类似传播结果,包括非 K-平凡性和自复杂性。我们证明,相对于 PA 度的 f 随机性意味着强 f 随机性,因此 f 随机性并不意味着相对于 PA 度的 f 随机性。
Let f be a computable function from finite sequences of 0ʼs and 1ʼs to real numbers. We prove that strong f-randomness implies strong f-randomness relative to a PA-degree. We also prove: if X is strongly f-random and Turing reducible to Y where Y is Martin-Löf random relative to Z, then X is strongly f-random relative to Z. In addition, we prove analogous propagation results for other notions of partial randomness, including non-K-triviality and autocomplexity. We prove that f-randomness relative to a PA-degree implies strong f-randomness, hence f-randomness does not imply f-randomness relative to a PA-degree.