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On the stable Andreadakis problem

Abstract : Let be the free group on n generators. Consider the group of automorphisms of acting trivially on its abelianization. There are two canonical filtrations on : the first one is its lower central series ⁎; the second one is the Andreadakis filtration ⁎, defined from the action on . In this paper, we establish that the canonical morphism between the associated graded Lie rings ⁎ and ⁎ is stably surjective. We then investigate a p-restricted version of the Andreadakis problem. A calculation of the Lie algebra of the classical congruence group is also included.
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Article dans une revue
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https://hal-univ-bourgogne.archives-ouvertes.fr/hal-02468983
Contributeur : Imb - Université de Bourgogne <>
Soumis le : jeudi 6 février 2020 - 11:54:23
Dernière modification le : mardi 6 octobre 2020 - 08:36:03

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Jacques Darné. On the stable Andreadakis problem. Journal of Pure and Applied Algebra, Elsevier, 2019, 223 (12), pp.5484-5525. ⟨10.1016/j.jpaa.2019.04.010⟩. ⟨hal-02468983⟩

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