SL$_{4}(\textbf{Z})$ is not purely matricial field

We prove that every non-zero finite dimensional unitary representation of $\mathrm{SL}_{4}(\mathbf{Z})$ contains a non-zero $\mathrm{SL}_{2}(\mathbf{Z})$-invariant vector. As a consequence, there is no sequence of finite-dimensional representations of $\mathrm{SL}_{4}(\mathbf{Z})$ that gives rise to...

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Bibliographic Details
Main Authors: Magee, Michael, de la Salle, Mikael
Format: Article
Language:English
Published: Académie des sciences 2024-10-01
Series:Comptes Rendus. Mathématique
Subjects:
Online Access:https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.5802/crmath.617/
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