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- W2890989854 abstract "In 1993, Lubotzky and Weiss conjectured that if a compact group admits two finitely generated dense subgroups, one of which is amenable and the other has Kazhdan's property (T), then it would be finite. This conjecture was resolved in the negative by Ershov and Jaikin-Zapirain, and by Kassabov around 2010. In the present paper, we provide an extreme counterexample to this conjecture. More precisely, the latter dense group with property (T) may contain a given countable residually finite group; in particular, it can be non-exact by a result of Osajda. We may construct these counterexamples with a compact group common for all countable residually finite groups." @default.
- W2890989854 created "2018-09-27" @default.
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- W2890989854 date "2018-09-24" @default.
- W2890989854 modified "2023-09-24" @default.
- W2890989854 title "A note on residually finite Kazhdan groups" @default.
- W2890989854 hasPublicationYear "2018" @default.
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