Volume-preserving actions of simple algebraic Q-groups on low-dimensional manifolds

Details Volume-preserving actions of simple algebraic Q-groups on low-dimensional manifolds Volume-preserving actions of simple algebraic Q-groups on low-dimensional manifolds

2012-04-14

arxiv.org/abs/1204.3139v1

Mathematics

Dynamical Systems

6 pages, no figures

Scientific paper

We prove that SL(n,Q) has no nontrivial, C-infinity, volume-preserving action on any compact manifold of dimension strictly less than n. More generally, suppose G is a connected, isotropic, almost-simple algebraic group over Q, such that the simple factors of every localization of G have rank at least two. If there does not exist a nontrivial homomorphism from G(R) to GL(d,C), then every C-infinity, volume-preserving action of G(Q) on any compact d-dimensional manifold must factor through a finite group.

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