Conformal Ehrenpreis conjecture

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Let Σ\Sigma be a fixed compact surface of genus greater than 11, let T(Σ)\mathcal{T}(\Sigma) be its Teichmüller space, and let dT(Σ)d_{\mathcal{T}(\Sigma)} be the Teichmüller metric. Given μ,ν∈T(Σ)\mu,\nu\in\mathcal{T}(\Sigma), finite covers ρ,σ:Z→Σ\rho,\sigma:Z\rightarrow\Sigma induce isometric inclusions ρ∗,σ∗:T(Σ)↪T(Z)\rho^*,\sigma^*: \mathcal{T}(\Sigma)\hookrightarrow\mathcal{T}(Z). Conformal Ehrenpreis conjecture. For any ϵ>0\epsilon>0, there exists a surface ZZ and finite covers ρ,σ:Z→Σ\rho,\sigma:Z\rightarrow\Sigma such that

dT(Z)(ρ∗μ,σ∗ν)<ϵ.d_{\mathcal{T}(Z)}(\rho^*\mu,\sigma^*\nu)<\epsilon.

This is the conformal or traditional Teichmüller-theoretic formulation of the Ehrenpreis conjecture. The source presents it as a conjectural version and notes that the analogous statement in genus 11 is not difficult to verify.

References

Primary source

T. M. Gendron, “The L^1 Ehrenpreis Conjecture”, arXiv:math/0506509 (2005).

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