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dc.contributor.author | Andrews U. | |
dc.contributor.author | Cai M. | |
dc.contributor.author | Kalimullin I. | |
dc.contributor.author | Lempp S. | |
dc.contributor.author | Miller J. | |
dc.contributor.author | Montalbán A. | |
dc.date.accessioned | 2018-09-19T20:16:56Z | |
dc.date.available | 2018-09-19T20:16:56Z | |
dc.date.issued | 2016 | |
dc.identifier.issn | 0022-4812 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/142785 | |
dc.description.abstract | © 2016, Association for Symbolic Logic.We study Turing degrees a for which there is a countable structure A whose degree spectrum is the collection {x: x ≰ a}. In particular, for degrees a from the interval [0ʹ, 0ʺ ], such a structure exists if aʹ = 0ʺ, and there are no such structures if aʺ > 0ʺʹ . | |
dc.relation.ispartofseries | Journal of Symbolic Logic | |
dc.subject | Algebraic structures | |
dc.subject | Computably enumerable (c.e.) sets | |
dc.subject | Degree spectra | |
dc.subject | Families of c.e. sets | |
dc.subject | Turing degrees | |
dc.title | The complements of lower cones of degrees and the degree spectra of structures | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 3 | |
dc.relation.ispartofseries-volume | 81 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 997 | |
dc.source.id | SCOPUS00224812-2016-81-3-SID84987850028 |