Institut Mittag-Leffler The Royal Swedish Academy of Sciences

Reports Institut Mittag-Leffler
ISSN: 1103-467X
ISRN: IML-R

On the Complexity of the Classification Problem for Torsion-Free Abelian Groups of Rank Two
Source file as TeX DVI Data Postscript Document Portable Document Format

Preprint series: Mathematical Logic - 2000/2001, No. 02

MSC 2000

03E15 Descriptive set theory

37A20 Orbit equivalence, cocycles, ergodic equivalence relations

Keywords: Borel equivalence relations, cocycles, torsion-free abelian groups