On the growth of L2-invariants of locally symmetric spaces, II: exotic invariant random subgroups in rank one
In the 1st paper of this series we studied the asymptotic behavior of Betti numbers, twisted torsion, and other spectral invariants for sequences of lattices in Lie groups G. A key element of our work was the study of invariant random subgroups (IRSs) of G. Any sequence of lattices has a subsequence...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Language: | English |
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Oxford University Press
2018
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| _version_ | 1826301552319528960 |
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| author | Abert, M Bergeron, N Biringer, I Gelander, T Nikolov, N Raimbault, J Samet, I |
| author_facet | Abert, M Bergeron, N Biringer, I Gelander, T Nikolov, N Raimbault, J Samet, I |
| author_sort | Abert, M |
| collection | OXFORD |
| description | In the 1st paper of this series we studied the asymptotic behavior of Betti numbers, twisted torsion, and other spectral invariants for sequences of lattices in Lie groups G. A key element of our work was the study of invariant random subgroups (IRSs) of G. Any sequence of lattices has a subsequence converging to an IRS, and when G has higher rank, the Nevo–Stuck–Zimmer theorem classifies all IRSs of G. Using the classification, one can deduce asymptotic statements about spectral invariants of lattices. When G has real rank one, the space of IRSs is more complicated. We construct here several uncountable families of IRSs in the groups SO(n, 1), n ≥ 2. We give dimension-specific constructions when n = 2, 3, and also describe a general gluing construction that works for every n. Part of the latter construction is inspired by Gromov and Piatetski-Shapiro’s construction of non-arithmetic lattices in SO(n, 1). |
| first_indexed | 2024-03-07T05:34:08Z |
| format | Journal article |
| id | oxford-uuid:e34c3415-65ba-44d7-986b-399fd1e2c779 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:34:08Z |
| publishDate | 2018 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:e34c3415-65ba-44d7-986b-399fd1e2c7792022-03-27T10:08:04ZOn the growth of L2-invariants of locally symmetric spaces, II: exotic invariant random subgroups in rank oneJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:e34c3415-65ba-44d7-986b-399fd1e2c779EnglishSymplectic Elements at OxfordOxford University Press2018Abert, MBergeron, NBiringer, IGelander, TNikolov, NRaimbault, JSamet, IIn the 1st paper of this series we studied the asymptotic behavior of Betti numbers, twisted torsion, and other spectral invariants for sequences of lattices in Lie groups G. A key element of our work was the study of invariant random subgroups (IRSs) of G. Any sequence of lattices has a subsequence converging to an IRS, and when G has higher rank, the Nevo–Stuck–Zimmer theorem classifies all IRSs of G. Using the classification, one can deduce asymptotic statements about spectral invariants of lattices. When G has real rank one, the space of IRSs is more complicated. We construct here several uncountable families of IRSs in the groups SO(n, 1), n ≥ 2. We give dimension-specific constructions when n = 2, 3, and also describe a general gluing construction that works for every n. Part of the latter construction is inspired by Gromov and Piatetski-Shapiro’s construction of non-arithmetic lattices in SO(n, 1). |
| spellingShingle | Abert, M Bergeron, N Biringer, I Gelander, T Nikolov, N Raimbault, J Samet, I On the growth of L2-invariants of locally symmetric spaces, II: exotic invariant random subgroups in rank one |
| title | On the growth of L2-invariants of locally symmetric spaces, II: exotic invariant random subgroups in rank one |
| title_full | On the growth of L2-invariants of locally symmetric spaces, II: exotic invariant random subgroups in rank one |
| title_fullStr | On the growth of L2-invariants of locally symmetric spaces, II: exotic invariant random subgroups in rank one |
| title_full_unstemmed | On the growth of L2-invariants of locally symmetric spaces, II: exotic invariant random subgroups in rank one |
| title_short | On the growth of L2-invariants of locally symmetric spaces, II: exotic invariant random subgroups in rank one |
| title_sort | on the growth of l2 invariants of locally symmetric spaces ii exotic invariant random subgroups in rank one |
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