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dc.contributor.author | Andrews U. | |
dc.contributor.author | Kuyper R. | |
dc.contributor.author | Lempp S. | |
dc.contributor.author | Soskova M. | |
dc.contributor.author | Yamaleev M. | |
dc.date.accessioned | 2018-09-19T20:29:47Z | |
dc.date.available | 2018-09-19T20:29:47Z | |
dc.date.issued | 2017 | |
dc.identifier.issn | 0302-9743 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/142960 | |
dc.description.abstract | © Springer International Publishing AG 2017.In this paper, we show that the so-called “double bubbles” are not downward dense in the d.c.e. degrees. Here, a pair of d.c.e. degrees d1 > d2 > 0 forms a double bubble if all d.c.e. degrees below d1 are comparable with d2. | |
dc.relation.ispartofseries | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | |
dc.subject | d.c.e. sets | |
dc.subject | Ershov hierarchy | |
dc.subject | Exact degrees | |
dc.subject | Lachlan sets | |
dc.title | Nondensity of double bubbles in the D.C.E. degrees | |
dc.type | Article | |
dc.relation.ispartofseries-volume | 10010 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 547 | |
dc.source.id | SCOPUS03029743-2017-10010-SID85008482324 |