The Π₂ ⁰ enumeration degrees are not dense

E-ISSN： 1943-5886|61|4|1364-1379

ISSN： 0022-4812

Source： The Journal of Symbolic Logic, Vol.61, Iss.4, 1996-12, pp. : 1364-1379

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

Related content

Structural properties and Σ₂ ⁰ enumeration degrees

The Journal of Symbolic Logic, Vol. 65, Iss. 1, 2000-03 ,pp. : 285-292

Cambridge University Press

Access to resources Recommend Favorite

Embedding finite lattices into the Σ₂ ⁰ enumeration degrees

The Journal of Symbolic Logic, Vol. 67, Iss. 1, 2002-03 ,pp. : 69-90

Cambridge University Press

Access to resources Recommend Favorite

Partial degrees and the density problem. Part 2: The enumeration degrees of the Σ ₂ sets are dense

The Journal of Symbolic Logic, Vol. 49, Iss. 2, 1984-06 ,pp. : 503-513

Cambridge University Press

Access to resources Recommend Favorite

The Π₃-theory of the -enumeration degrees is undecidable

The Journal of Symbolic Logic, Vol. 71, Iss. 4, 2006-12 ,pp. : 1284-1302

Cambridge University Press

Access to resources Recommend Favorite

Noncappable enumeration degrees below 0 _e ^′

The Journal of Symbolic Logic, Vol. 61, Iss. 4, 1996-12 ,pp. : 1347-1363

Cambridge University Press

Access to resources Recommend Favorite