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On groups interpretable in various valued fields

  • Yatir Halevi,
  • Assaf Hasson,
  • Ya’acov Peterzil

摘要

We study infinite groups interpretable in three families of valued fields: V-minimal, power bounded T-convex, and p-adically closed fields. We show that every such group G has unbounded exponent and that if G is dp-minimal then it is abelian-by-finite. Along the way, we associate with any infinite interpretable group an infinite type-definable subgroup which is definably isomorphic to a group in one of four distinguished sorts: the underlying valued field K, its residue field \({\textbf {k}}\) k (when infinite), its value group \(\Gamma \) Γ , or \(K/\mathcal {O}\) K / O , where \(\mathcal {O}\) O is the valuation ring. Our work uses and extends techniques developed in Halevi et al. (Adv Math 404:108408, 2022) to circumvent elimination of imaginaries.