The isomorphism relation on countable torsion free abelian groups
Greg Hjorth
Fundamenta Mathematicae, Tome 173 (2002), p. 241-257 / Harvested from The Polish Digital Mathematics Library
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The isomorphism relation on countable torsion free abelian groups is non-Borel.

Publié le : 2002-01-01
EUDML-ID : urn:eudml:doc:282679 
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     author = {Greg Hjorth},
     title = {The isomorphism relation on countable torsion free abelian groups},
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     volume = {173},
     year = {2002},
     pages = {241-257},
     zbl = {1021.03042},
     language = {en},
     url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm175-3-2}
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Greg Hjorth. The isomorphism relation on countable torsion free abelian groups. Fundamenta Mathematicae, Tome 173 (2002) pp. 241-257. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm175-3-2/