Groups with exotic finiteness properties from complex Morse theory

Abstract Recent constructions have shown that interesting behaviours can be observed in the finiteness properties of Kähler groups and their subgroups. In this work, we push this further and exhibit, for each integer , new hyperbolic groups admitting surjective homomorphisms to and to , whose kernel is of type but not of type . By a fibre product construction, we also find examples of non‐normal subgroups of Kähler groups with exotic finiteness properties.

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Publication Details

Journal
Journal of Topology
Published
2025-02-28
DOI
https://doi.org/10.1112/topo.70013
Primary Topic
Advanced Algebra and Geometry
Type
article
Field-Weighted Citation Impact
0.00

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article

Groups with exotic finiteness properties from complex Morse theory

Claudio Llosa Isenrich, Pierre Py
Journal of Topology
Advanced Algebra and Geometry
article

Groups with exotic finiteness properties from complex Morse theory

Claudio Llosa Isenrich, Pierre Py
article en

Abstract

Abstract Recent constructions have shown that interesting behaviours can be observed in the finiteness properties of Kähler groups and their subgroups. In this work, we push this further and exhibit, for each integer , new hyperbolic groups admitting surjective homomorphisms to and to , whose kernel is of type but not of type . By a fibre product construction, we also find examples of non‐normal subgroups of Kähler groups with exotic finiteness properties.

Journal of TopologyVol. 18(1)
Karlsruhe Institute of Technology (DE), Centre National de la Recherche Scientifique (FR), Institut Fourier (FR), Université Grenoble Alpes (FR)
Agence Nationale de la Recherche
Decent work and economic growth
Openalex Percentile: Top 92%
Advanced Algebra and Geometry
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