The deformation conjecture for cocompact hyperbolic lattices

For n⩾2n\geqslant 2, let Γ\Gamma be a cocompact lattice of O⁡(n,1)\operatorname{O}(n,1), and let N⩾nN\geqslant n. Consider the standard embedding

Γ↪O⁡(n,1)↪O⁡(N,1).\Gamma\hookrightarrow\operatorname{O}(n,1)\hookrightarrow\operatorname{O}(N,1).

A representation is strictly dominated by this embedding if it is dominated in the sense used in the source. Deformation conjecture. For every n⩾2n\geqslant 2, there exist a cocompact lattice Γ\Gamma of O⁡(n,1)\operatorname{O}(n,1) and N⩾nN\geqslant n such that every neighbourhood of the standard embedding in Hom⁡(Γ,O⁡(N,1))\operatorname{Hom}(\Gamma,\operatorname{O}(N,1)) contains a representation strictly dominated by it. The source presents this as a sufficient conjectural statement that would imply the preceding cocompact hyperbolic-lattice conjecture.

References

Primary source

Maciej Bochenski and Yosuke Morita, “Exotic proper actions on homogeneous spaces via convex cocompact representations”, arXiv:2501.14274 (2025).

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