The hyperbolic Ehrenpreis conjecture

Let ϵ>0\epsilon>0 and let S1,S2S_1,S_2 be two closed hyperbolic surfaces. A finite-sheeted locally isometric cover of a surface is a finite-sheeted covering surface equipped with the pulled-back hyperbolic metric. The hyperbolic Ehrenpreis conjecture. There exist finite-sheeted locally isometric covers S~i\widetilde{S}_i of SiS_i for i=1,2i=1,2 such that there is a (1+ϵ)(1+\epsilon)-bi-Lipschitz homeomorphism

S~1S~2.\widetilde{S}_1\cong\widetilde{S}_2.

The conjecture concerns the common geometry of finite covers of closed hyperbolic surfaces. It is attributed in the source to Ehrenpreis and Goldman; the source does not state its resolution status.

Sources & referencesView supporting material

Primary source

Lewis Bowen, “Immersions of Pants into a Fixed Hyperbolic Surface”, arXiv:math/0505480 (2005).

Additional references

2 papers in this index state this conjecture (2004–2005). The statement above is taken from the most recent of them; the others are arXiv:math/0411662.

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