Comparing the degrees of enumerability and the closed Medvedev degrees
Comparing the degrees of enumerability and the closed Medvedev degrees
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比较可枚举度和封闭梅德韦杰夫度
DOI:
10.1007/s00153-018-0648-x
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发表时间:
2018
影响因子:
0.3
通讯作者:
Shafer P
中科院分区:
文献类型:
--
作者:
Shafer P
We compare the degrees of enumerability and the closed Medvedev degrees and find that many situations occur. There are nonzero closed degrees that do not bound nonzero degrees of enumerability, there are nonzero degrees of enumerability that do not bound nonzero closed degrees, and there are degrees that are nontrivially both degrees of enumerability and closed degrees. We also show that the compact degrees of enumerability exactly correspond to the cototal enumeration degrees.
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DOI:
10.1142/9789812834553_0003
发表时间:
2004
期刊:
--
影响因子:
--
作者:
N. G. Martínez;H. Priestley
通讯作者:
N. G. Martínez;H. Priestley
DOI:
--
发表时间:
1988
期刊:
Journal of Symbolic Logic (JSL)
影响因子:
--
作者:
K. Copestake
通讯作者:
K. Copestake
影响因子:
0.6
作者:
P. Hinman
通讯作者:
P. Hinman
DOI:
--
发表时间:
1990
期刊:
Journal of Symbolic Logic (JSL)
影响因子:
--
作者:
A. Sorbi
通讯作者:
A. Sorbi
DOI:
--
发表时间:
1988
期刊:
影响因子:
--
作者:
E. Z. Skvortsova
通讯作者:
E. Z. Skvortsova