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arXiv · 2111.11586

Fiber products of rank 1 superrigid lattices and quasi-isometric embeddings

Konstantinos Tsouvalas
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Abstract

Let $\Delta$ be a cocompact lattice in $\mathsf{Sp}(m,1)$, $m \geq 2$, or $F_{4}^{(-20)}$. We exhibit examples of finitely generated subgroups of $\Delta \times \Delta$ with positive first Betti number all of whose discrete faithful representations into any real semisimple Lie group are quasi-isometric embeddings. The examples of this paper are inspired by the counterexamples of Bass-Lubotzky [BL00] to Platonov's conjecture.

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Konstantinos Tsouvalas. 2021-11-23. Fiber products of rank 1 superrigid lattices and quasi-isometric embeddings. https://arxiv.org/abs/2111.11586

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