Homeomorphism groups of self-similar 2-manifolds
Fuente:
arXiv
Guardado en:
| Autor principal: | |
|---|---|
| Formato: | Preprint |
| Publicado: |
2023
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866910354518310912 |
|---|---|
| author | Vlamis, Nicholas G. |
| author_facet | Vlamis, Nicholas G. |
| contents | The class of self-similar 2-manifolds consists of manifolds exhibiting a type of homogeneity akin to the 2-sphere and the Cantor set, and includes both the 2-sphere and the 2-sphere with a Cantor set removed. This chapter aims to provide a narrative thread between recent results on the structure of homeomorphism groups/mapping class groups of self-similar 2-manifolds, and also connections to classical structural results on the homeomorphism group of the 2-sphere and the Cantor set. In order to do this, we provide a survey of recent results, an exposition on classical results about homeomorphism groups, provide a treatment of the structure of stable sets, and prove extensions/strengthenings of the recent results surveyed.
Of particular note, we establish the following theorems: (1) A characterization of homeomorphisms of (orientable) perfectly self-similar 2-manifolds that normally generate the group of (orientation-preserving) homeomorphisms -- a strengthening of a result of Malestein-Tao. (2) The homeomorphism group of a perfectly self-similar 2-manifold is strongly distorted -- an extension of a result of Calegari-Freedman for spheres. (3) The homeomorphism group of a perfectly tame 2-manifold is Steinhaus, and hence has the automatic continuity property -- an extension of a result of Mann in dimension two -- providing the first examples of homeomorphism groups of infinite-genus 2-manifolds with the Steinhaus property. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_08619 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Homeomorphism groups of self-similar 2-manifolds Vlamis, Nicholas G. Geometric Topology Group Theory 57K20, 57S05, 54H11, 20F65 The class of self-similar 2-manifolds consists of manifolds exhibiting a type of homogeneity akin to the 2-sphere and the Cantor set, and includes both the 2-sphere and the 2-sphere with a Cantor set removed. This chapter aims to provide a narrative thread between recent results on the structure of homeomorphism groups/mapping class groups of self-similar 2-manifolds, and also connections to classical structural results on the homeomorphism group of the 2-sphere and the Cantor set. In order to do this, we provide a survey of recent results, an exposition on classical results about homeomorphism groups, provide a treatment of the structure of stable sets, and prove extensions/strengthenings of the recent results surveyed. Of particular note, we establish the following theorems: (1) A characterization of homeomorphisms of (orientable) perfectly self-similar 2-manifolds that normally generate the group of (orientation-preserving) homeomorphisms -- a strengthening of a result of Malestein-Tao. (2) The homeomorphism group of a perfectly self-similar 2-manifold is strongly distorted -- an extension of a result of Calegari-Freedman for spheres. (3) The homeomorphism group of a perfectly tame 2-manifold is Steinhaus, and hence has the automatic continuity property -- an extension of a result of Mann in dimension two -- providing the first examples of homeomorphism groups of infinite-genus 2-manifolds with the Steinhaus property. |
| title | Homeomorphism groups of self-similar 2-manifolds |
| topic | Geometric Topology Group Theory 57K20, 57S05, 54H11, 20F65 |
| url | https://arxiv.org/abs/2306.08619 |