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|Title:||On Σ1-structural differences among finite levels of the Ershov hierarchy|
|Authors:||Yang, Y. |
|Citation:||Yang, Y., Yu, L. (2006-12). On Σ1-structural differences among finite levels of the Ershov hierarchy. Journal of Symbolic Logic 71 (4) : 1223-1236. ScholarBank@NUS Repository. https://doi.org/10.2178/jsl/1164060453|
|Abstract:||We show that the structure ℛ of recursively enumerable degrees is not a Σ1-elementary substructure of script Dn, where script Dn (n > 1) is the structure of n-r.e. degrees in the Ershov hierarchy. © 2006, Association for Symbolic Logic.|
|Source Title:||Journal of Symbolic Logic|
|Appears in Collections:||Staff Publications|
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