Dichotomy and measures on limit sets of Anosov groups

Minju Lee; Hee Oh

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arXiv · 2203.06794

Dichotomy and measures on limit sets of Anosov groups

Minju Lee·Hee Oh

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Abstract

Let $G$ be a connected semisimple real algebraic group. For any Zariski dense Anosov subgroup $\Gamma <G$, we show that a $\Gamma$-conformal measure is supported on the limit set of $\Gamma$ if and only if its "dimension" is $\Gamma$-critical. This implies the uniqueness of a $\Gamma$-conformal measure for each critical dimension. We deduce this from a higher rank analogue of the Hopf-Tsuji-Sullivan dichotomy for the maximal diagonal action. Other applications include an analogue of the Ahlfors measure conjecture for Anosov subgroups.

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Minju Lee, Hee Oh. 2022-03-14. Dichotomy and measures on limit sets of Anosov groups. https://arxiv.org/abs/2203.06794

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