Geodesic
Undecidability of elementary theory of Rogers semilattices in analytical hierarchy
Sibirskie èlektronnye matematičeskie izvestiâ, Tome 13 (2016), pp. 148-153.

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We prove that the elementary theory of any nontrivial Rogers semilattice for analytical sets of bounded complexity is hereditarily undecidable. We also prove some results on the existence of minimal numberings in such lattices.
Keywords: analitycal hierarchy, computable numberings, minimal numberings, Rogers semilattices. 
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M. V. Dorzhieva. Undecidability of elementary theory of Rogers semilattices in analytical hierarchy. Sibirskie èlektronnye matematičeskie izvestiâ, Tome 13 (2016), pp. 148-153. http://geodesic.mathdoc.fr/item/SEMR_2016_13_a5/

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