GGS-groups over primary trees: branch structures
We study branch structures in Grigorchuk–Gupta–Sidki groups (GGS-groups) over primary trees, that is, regular rooted trees of degree pn for a prime p. Apart from a small set of exceptions for p=2, we prove that all these groups are weakly regular branch over G′′. Furthermore, in most cases they are...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universidad del País Vasco |
| Repositorio: | Addi. Archivo Digital para la Docencia y la Investigación |
| OAI Identifier: | oai:addi.ehu.eus:10810/61079 |
| Acceso en línea: | http://hdl.handle.net/10810/61079 |
| Access Level: | acceso abierto |
| Palabra clave: | group theory automorphisms of rooted trees branch groups weakly branch groups |
| Sumario: | We study branch structures in Grigorchuk–Gupta–Sidki groups (GGS-groups) over primary trees, that is, regular rooted trees of degree pn for a prime p. Apart from a small set of exceptions for p=2, we prove that all these groups are weakly regular branch over G′′. Furthermore, in most cases they are actually regular branch over γ3(G). This is a significant extension of previously known results regarding periodic GGS-groups over primary trees and general GGS-groups in the case n=1. We also show that, as in the case n=1, a GGS-group generated by a constant vector is not branch. |
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