On the definable ideal generated by nonbounding c.e. degrees
Yu, Liang ; Yang, Yue
J. Symbolic Logic, Tome 70 (2005) no. 1, p. 252-270 / Harvested from Project Euclid
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Let [NB]1 denote the ideal generated by nonbounding c.e. degrees and NCup the ideal of noncuppable c.e. degrees. We show that both [NB]1 ∩ NCup and the ideal generated by nonbounding and noncuppable degrees are new, in the sense that they are different from M, [NB]1 and NCup—the only three known definable ideals so far.
Publié le : 2005-03-14
Classification:  03D25 
@article{1107298519,
     author = {Yu, Liang and Yang, Yue},
     title = {On the definable ideal generated by nonbounding c.e. degrees},
     journal = {J. Symbolic Logic},
     volume = {70},
     number = {1},
     year = {2005},
     pages = { 252-270},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1107298519}
}

Yu, Liang; Yang, Yue. On the definable ideal generated by nonbounding c.e. degrees. J. Symbolic Logic, Tome 70 (2005) no. 1, pp.  252-270. http://gdmltest.u-ga.fr/item/1107298519/