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https://hdl.handle.net/10356/99244
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DC Field | Value | Language |
---|---|---|
dc.contributor.author | Fang, Chengling | en |
dc.contributor.author | Wu, Guohua | en |
dc.date.accessioned | 2013-10-31T07:20:38Z | en |
dc.date.accessioned | 2019-12-06T20:05:00Z | - |
dc.date.available | 2013-10-31T07:20:38Z | en |
dc.date.available | 2019-12-06T20:05:00Z | - |
dc.date.copyright | 2012 | en |
dc.date.issued | 2012 | en |
dc.identifier.citation | Fang, C., & Wu, G. (2012). Nonhemimaximal degrees and the high/low hierarchy. Journal of symbolic logic, 77(2), 433-446. | en |
dc.identifier.issn | 0022-4812 | en |
dc.identifier.uri | https://hdl.handle.net/10356/99244 | - |
dc.description.abstract | After showing the downwards density of nonhemimaximal degrees, Downey and Stob continued to prove that the existence of a low₂, but not low, nonhemimaximal degree, and their proof uses the fact that incomplete m-topped degrees are low₂ but not low. As commented in their paper, the construction of such a nonhemimaximal degree is actually a primitive 0''' argument. In this paper, we give another construction of such degrees, which is a standard 0''-argument, much simpler than Downey and Stob's construction mentioned above. | en |
dc.language.iso | en | en |
dc.relation.ispartofseries | Journal of symbolic logic | en |
dc.subject | DRNTU::Science::Mathematics::Mathematical logic | en |
dc.title | Nonhemimaximal degrees and the high/low hierarchy | en |
dc.type | Journal Article | en |
dc.contributor.school | School of Physical and Mathematical Sciences | en |
dc.identifier.doi | 10.2178/jsl/1333566631 | en |
item.fulltext | No Fulltext | - |
item.grantfulltext | none | - |
Appears in Collections: | SPMS Journal Articles |
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