تقرير
On equivalence relations induced by Polish groups admitting compatible two-sided invariant metrics
| العنوان: | On equivalence relations induced by Polish groups admitting compatible two-sided invariant metrics |
|---|---|
| المؤلفون: | Ding, Longyun, Zheng, Yang |
| سنة النشر: | 2024 |
| المجموعة: | Mathematics |
| مصطلحات موضوعية: | Mathematics - Logic, 03E15, 22A05, 22D05, 22E15, 46A16 |
| الوصف: | Given a Polish group $G$, let $E(G)$ be the right coset equivalence relation $G^\omega/c(G)$, where $c(G)$ is the group of all convergent sequences in $G$. We first established two results: (1) Let $G,H$ be two Polish groups. If $H$ is TSI but $G$ is not, then $E(G)\not\le_BE(H)$. (2) Let $G$ be a Polish group. Then the following are equivalent: (a) $G$ is TSI non-archimedean; (b)$E(G)\leq_B E_0^\omega$; and (c) $E(G)\leq_B{\mathbb R}^\omega/c_0$. In particular, $E(G)\sim_B E_0^\omega$ iff $G$ is TSI uncountable non-archimedean. A critical theorem presented in this article is as follows: Let $G$ be a TSI Polish group, and let $H$ be a closed subgroup of the product of a sequence of TSI strongly NSS Polish groups. If $E(G)\le_BE(H)$, then there exists a continuous homomorphism $S:G_0\rightarrow H$ such that $\ker(S)$ is non-archimedean, where $G_0$ is the connected component of the identity of $G$. The converse holds if $G$ is connected, $S(G)$ is closed in $H$, and the interval $[0,1]$ can be embedded into $H$. As its applications, we prove several Rigid theorems for TSI Lie groups, locally compact Polish groups, separable Banach spaces, and separable Fr\'echet spaces, respectively. Comment: 38 pages |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2401.15556 |
| رقم الأكسشن: | edsarx.2401.15556 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |