Markov processes associated to fractal branch groups
Fuente:
arXiv
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866915307447123968 |
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| author | Fariña-Asategui, Jorge |
| author_facet | Fariña-Asategui, Jorge |
| contents | The author introduced recently a new natural construction which associates a measure-preserving dynamical system to any fractal profinite group. Here, we investigate these measure-preserving dynamical systems under the extra assumption on the groups to be branch. First, we compute their $f$-invariant, a measure-conjugacy invariant introduced by Bowen, and show that they are Markov processes over free semigroups in the sense of Bowen. Secondly, we show that fractal branch profinite groups with the same Hausdorff dimension and whose associated measure-preserving dynamical systems have the same $f$-invariant yield isomorphic Markov processes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_21134 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Markov processes associated to fractal branch groups Fariña-Asategui, Jorge Dynamical Systems Group Theory Primary: 20E08, 60J05. Secondary: 37A05, 22F50 The author introduced recently a new natural construction which associates a measure-preserving dynamical system to any fractal profinite group. Here, we investigate these measure-preserving dynamical systems under the extra assumption on the groups to be branch. First, we compute their $f$-invariant, a measure-conjugacy invariant introduced by Bowen, and show that they are Markov processes over free semigroups in the sense of Bowen. Secondly, we show that fractal branch profinite groups with the same Hausdorff dimension and whose associated measure-preserving dynamical systems have the same $f$-invariant yield isomorphic Markov processes. |
| title | Markov processes associated to fractal branch groups |
| topic | Dynamical Systems Group Theory Primary: 20E08, 60J05. Secondary: 37A05, 22F50 |
| url | https://arxiv.org/abs/2505.21134 |