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