arXivDaily arXiv每日学术速递 周一至周五更新
arXiv math/0405352math.DSmath.GR
收藏

G-连续函数与涡动作用

G-continuous functions and whirly actions

E. Glasner, B. Weiss

摘要:

本文继续了Danner-Tsirelson-Weiss,ArXiv math.DS/0311450的工作。对Polish群G,进一步利用G-连续函数和涡动作用的概念证明了:(i)G-作用是涡动的当且仅当它不存在非平凡的空间(=点态)因子. (ii)波兰列维集团的每一个行动都是旋转的。(iii)存在着一个波兰一元论集团,它不是利维,但承认一个旋转的行动。(iv)在波兰群Aut(X,μ)中,对于一般自同构T,波兰群Λ(T)=闭包{T^n:nPDMATHABMM Z} \subset Aut(X,μ)在Lebesgue空间(X,μ)上的作用是旋转的. (v)可分希尔伯特空间的波兰加法群允许空间和旋转忠实作用。(vi)当G是一个非阿基米德波兰群时,则每个G-作用都是空间的。

英文摘要:

This paper continues the work Glasner-Tsirelson-Weiss, ArXiv math.DS/0311450. For a Polish group G the notions of G-continuous functions and whirly actions are further exploited to show that: (i) A G-action is whirly iff it admits no nontrivial spatial (= pointwise) factors. (ii) Every action of a Polish Levy group is whirly. (iii) There exists a Polish monothetic group which is not Levy but admits a whirly action. (iv) In the Polish group Aut(X,μ), for the generic automorphism T, the action of the Polish group Λ(T) = closure {T^n: n \in Z} \subset Aut(X,μ) on the Lebesgue space (X,μ) is whirly. (v) The Polish additive group underlying a separable Hilbert space admits both spatial and whirly faithful actions. (vi) When G is a non-archimedean Polish group then every G-action is spatial.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑