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