Abstract
Let Γ = SL(n, ℤ) or any subgroup of finite index, n ≥ 4. We show that the standard action of Γ on\(\mathbb{T}\) n is locally rigid, i.e., every action of Γ on\(\mathbb{T}\) n by C∞ diffeomorphisms which is sufficiently close to the standard action is conjugate to the standard action by a C∞ diffeomorphism. In the course of the proof, we obtain a global rigidity result (Theorem 4.12) for actions of free abelian subgroups of maximal rank in SL(n, ℤ).
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Partially supported by NSF grant DMS9011749.
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Katok, A., Lewis, J. Local rigidity for certain groups of toral automorphisms. Israel J. Math. 75, 203–241 (1991). https://doi.org/10.1007/BF02776025
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DOI: https://doi.org/10.1007/BF02776025