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Embedding Finite Lattices into the Ideals of Computably Enumerable Turing Degrees

✍ Scribed by William C. Calhoun and Manuel Lerman


Book ID
124978639
Publisher
Association for Symbolic Logic
Year
2001
Tongue
English
Weight
274 KB
Volume
66
Category
Article
ISSN
0022-4812

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πŸ“œ SIMILAR VOLUMES


A necessary and sufficient condition for
✍ M. Lerman πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 176 KB

We present a necessary and su cient condition for the embeddability of a principally decomposable ΓΏnite lattice into the computably enumerable degrees. This improves a previous result which required that, in addition, the lattice be ranked. The same condition is also necessary and su cient for a ΓΏni