Borel equivalence relations Greg Hjorth March 30, 2006 This chapter is setting out to achieve an impossibility, namely to survey the rapidly exploding field of Borel equivalence relations as found in descriptive set theo

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• Descriptive set theory
• Borel set
• Borel equivalence relation
• Borel measure
• Sigma-algebra
• Equivalence relation
• Polish space
• Borel subgroup
• Infinity-Borel set
• Mathematical logic
• Mathematical analysis
• Mathematics