Bibliographic Details
| Title: |
Abelian groups definable in $p$-adically closed fields |
| Authors: |
Johnson, Will, Yao, Ningyuan |
| Publication Year: |
2022 |
| Collection: |
Mathematics |
| Subject Terms: |
Mathematics - Logic, 03C60 |
| More Details: |
Recall that a group $G$ has finitely satisfiable generics ($fsg$) or definable $f$-generics ($dfg$) if there is a global type $p$ on $G$ and a small model $M_0$ such that every left translate of $p$ is finitely satisfiable in $M_0$ or definable over $M_0$, respectively. We show that any abelian group definable in a $p$-adically closed field is an extension of a definably compact $fsg$ definable group by a $dfg$ definable group. We discuss an approach which might prove a similar statement for interpretable abelian groups. In the case where $G$ is an abelian group definable in the standard model $\mathbb{Q}_p$, we show that $G^0 = G^{00}$, and that $G$ is an open subgroup of an algebraic group, up to finite factors. This latter result can be seen as a rough classification of abelian definable groups in $\mathbb{Q}_p$.
Comment: 20 pages; updated references and fixed subscript typo in abstract |
| Document Type: |
Working Paper |
| Access URL: |
http://arxiv.org/abs/2206.14364 |
| Accession Number: |
edsarx.2206.14364 |
| Database: |
arXiv |
