Definable Topological Dynamics of $S{L}_2(\mathbb{C}((t))$

Abstract

We initiate a study of definable topological dynamics for groups definable in metastable theories. Specifically, we consider the special linear group $G=S{L}_2$ with entries from $M=\mathbb{C}((t))$; the field of formal Laurent series with complex coefficients. We prove such a group is not definably amenable, find a suitable group decomposition, and describe the minimal flows of the additive and multiplicative groups of $\mathbb{C}((t))$. The main result is an explicit description of the minimal flow and Ellis Group of $(G(M),S_G(M))$ and we observe that this is not isomorphic to $G/G^{00}$, answering a question as to whether metastability is a suitable weakening of a conjecture of Newelski.

References in corpus (1)

• On minimal flows. definably amenable groups, and o-minimality