English

Definable Topological Dynamics of $SL_2(\mathbb{C}((t))$

Logic 2019-03-11 v1

Abstract

We initiate a study of definable topological dynamics for groups definable in metastable theories. Specifically, we consider the special linear group G=SL2G = SL_2 with entries from M=C((t))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 C((t))\mathbb{C}((t)). The main result is an explicit description of the minimal flow and Ellis Group of (G(M),SG(M))(G(M),S_G(M)) and we observe that this is not isomorphic to G/G00G/G^{00}, answering a question as to whether metastability is a suitable weakening of a conjecture of Newelski.

Keywords

Cite

@article{arxiv.1903.03570,
  title  = {Definable Topological Dynamics of $SL_2(\mathbb{C}((t))$},
  author = {Thomas Kirk},
  journal= {arXiv preprint arXiv:1903.03570},
  year   = {2019}
}
R2 v1 2026-06-23T08:02:31.841Z