Orbit inequivalent actions for groups containing a copy of F2

• 成果类型: Article
• 署名作者: Ioana, Adrian
• 署名单位: California Institute of Technology
• 刊物名称: INVENTIONES MATHEMATICAE
• ISSN/ISSBN: 0020-9910
• DOI: 10.1007/s00222-010-0301-8
• 发表日期: 2011
• 页码: 55-73
• 关键词: equivalence rigidity; malleable actions; ergodic actions; ii1 factors; property-t; invariant; FAMILY

摘要

We prove that if a countable group Gamma contains a copy of F-2, then it admits uncountably many non orbit equivalent actions.