Reznikov's period integral conjecture for closed geodesics on hyperbolic surfaces

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Let (M,g)(M,g) be a compact hyperbolic surface, let eλe_\lambda be an eigenfunction of −Δg\sqrt{-\Delta_g} with eigenvalue λ\lambda, and let γ\gamma be a periodic geodesic or a geodesic circle on MM. Given ε>0\varepsilon>0, let CεC_\varepsilon depend on ε\varepsilon, MM, and the length of γper\gamma_{per}. Reznikov's period integral conjecture. One has

∣∫γeλ ds∣≤Cελ−12+ε.\left|\int_{\gamma} e_\lambda\,ds\right|\leq C_\varepsilon\lambda^{-\frac12+\varepsilon}.

This is an analogue of the Lindelöf conjecture for certain LL-functions and would substantially improve the uniform boundedness estimate known for periodic geodesics. The supplied text does not indicate whether the conjecture has been resolved.

References

Primary source

Emmett L. Wyman and Yakun Xi, “Improved Generalized Periods Estimates Over Curves on Riemannian Surfaces with Nonpositive Curvature”, arXiv:1807.00041 (2018).

Additional references

3 papers in this index state this conjecture (2017–2018). The statement above is taken from the most recent of them; the others are arXiv:1806.01424, arXiv:1705.01688.

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