Non-commutative Factor theorem for tensor products of lattices in product groups

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Authors: Tattwamasi Amrutam, Yongle Jiang, Shuoxing Zhou
Cited by: 0

Abstract

We establish a non-commutative version of the Intermediate Factor Theorem for crossed products associated with product lattices. Given an irreducible lattice $Γ< G= G_1 \times \dots \times G_d$ in higher rank semisimple algebraic groups and a trace-preserving irreducible action $G \curvearrowright (\mathcal{N}, τ)$, we show that every intermediate von Neumann algebra between $\mathcal{N}\rtimesΓ$ and $(L^\infty(G/P,ν_P)\overline{\otimes}\mathcal{N})\rtimesΓ$ is again a crossed product of the form $(L^\infty(G/Q,ν_Q)\overline{\otimes}\mathcal{N})\rtimesΓ$.

Fields of Study & Subjects

Advanced Operator Algebra Research Advanced Algebra and Geometry Advanced Topology and Set Theory

Publication details

Journal / source
arXiv (Cornell University)
Publication date
14 January 2026
Document type
Preprint