Geodesic
Necessary Isomorphism Conditions for Rogers Semilattices of Finite Partially Ordered Sets
Algebra i logika, Tome 42 (2003) no. 4, pp. 413-421

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We establish a condition that is necessary for Rogers semilattices of computable numberings of finite families of computably enumerable sets to be isomorphic.
Keywords: computable numbering, computably enumerable set, Rogers semilattice. 
@article{AL_2003_42_4_a1,
     author = {Yu. L. Ershov},
     title = {Necessary {Isomorphism} {Conditions} for {Rogers} {Semilattices} of {Finite} {Partially} {Ordered} {Sets}},
     journal = {Algebra i logika},
     pages = {413--421},
     publisher = {mathdoc},
     volume = {42},
     number = {4},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2003_42_4_a1/}
}
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Yu. L. Ershov. Necessary Isomorphism Conditions for Rogers Semilattices of Finite Partially Ordered Sets. Algebra i logika, Tome 42 (2003) no. 4, pp. 413-421. http://geodesic.mathdoc.fr/item/AL_2003_42_4_a1/