Geodesic
The isomorphism relation on countable torsion free abelian groups
Greg Hjorth 1
1 6363 MSB, Mathematics UCLA Los Angeles, CA 90095-1555, U.S.A.
Fundamenta Mathematicae, Tome 175 (2002) no. 3, pp. 241-257 Cet article a éte moissonné depuis la source Institute of Mathematics Polish Academy of Sciences

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The isomorphism relation on countable torsion free abelian groups is non-Borel.
DOI : 10.4064/fm175-3-2
Keywords: isomorphism relation countable torsion abelian groups non borel

Greg Hjorth  1

1 6363 MSB, Mathematics UCLA Los Angeles, CA 90095-1555, U.S.A. 
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 abelian groups
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 abelian groups
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Greg Hjorth. The isomorphism relation on countable torsion free
 abelian groups. Fundamenta Mathematicae, Tome 175 (2002) no. 3, pp. 241-257. doi: 10.4064/fm175-3-2

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