{"title":"关于可在各种值域中解释的群","authors":"Yatir Halevi, Assaf Hasson, Ya’acov Peterzil","doi":"10.1007/s00029-024-00946-2","DOIUrl":null,"url":null,"abstract":"<p>We study infinite groups interpretable in three families of valued fields: <i>V</i>-minimal, power bounded <i>T</i>-convex, and <i>p</i>-adically closed fields. We show that every such group <i>G</i> has unbounded exponent and that if <i>G</i> 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 <i>K</i>, its residue field <span>\\({\\textbf {k}}\\)</span> (when infinite), its value group <span>\\(\\Gamma \\)</span>, or <span>\\(K/\\mathcal {O}\\)</span>, where <span>\\(\\mathcal {O}\\)</span> 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.</p>","PeriodicalId":501600,"journal":{"name":"Selecta Mathematica","volume":"16 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"On groups interpretable in various valued fields\",\"authors\":\"Yatir Halevi, Assaf Hasson, Ya’acov Peterzil\",\"doi\":\"10.1007/s00029-024-00946-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>We study infinite groups interpretable in three families of valued fields: <i>V</i>-minimal, power bounded <i>T</i>-convex, and <i>p</i>-adically closed fields. We show that every such group <i>G</i> has unbounded exponent and that if <i>G</i> 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 <i>K</i>, its residue field <span>\\\\({\\\\textbf {k}}\\\\)</span> (when infinite), its value group <span>\\\\(\\\\Gamma \\\\)</span>, or <span>\\\\(K/\\\\mathcal {O}\\\\)</span>, where <span>\\\\(\\\\mathcal {O}\\\\)</span> 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.</p>\",\"PeriodicalId\":501600,\"journal\":{\"name\":\"Selecta Mathematica\",\"volume\":\"16 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-06-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Selecta Mathematica\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1007/s00029-024-00946-2\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Selecta Mathematica","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1007/s00029-024-00946-2","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
我们研究了可在三个有价域中解释的无限群:V-最小域、幂有界 T-凸域和 p-adically 闭域。我们证明,每一个这样的群 G 都具有无界指数,而且如果 G 是 dp 最小群,那么它就是无边群。在此过程中,我们将无限可解释群与一个无限类型定义子群联系起来,这个子群与四个不同类型中的一个群是同构的:底层值域 K、它的残差域 \({\textbf{k}}\)(当无限时)、它的值群 \(\Gamma\)或 \(K/\mathcal{O}\),其中 \(\mathcal{O}\)是值环。我们的工作使用并扩展了哈勒维等人(Adv Math 404:108408, 2022)开发的技术,以规避消除想象。
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 \({\textbf {k}}\) (when infinite), its value group \(\Gamma \), or \(K/\mathcal {O}\), where \(\mathcal {O}\) 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.