Actions of higher-rank lattices on free groups
classification
🧮 math.GR
math.GT
keywords
groupfreegammaactionsautomorphismeveryfinitefinitely
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If $G$ is a semisimple Lie group of real rank at least 2 and $\Gamma$ is an irreducible lattice in $G$, then every homomorphism from $\Gamma$ to the outer automorphism group of a finitely generated free group has finite image.
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