Bounded-deviation strengthening for closed tracking geodesics

Let fHomeo0(S)f\in\operatorname{Homeo}_0(S), where SS is a closed surface of genus g2g\ge 2. Suppose that the set of contractible fixed points of ff is inessential. Let γ\gamma be a closed geodesic that is a tracking geodesic for some μMϑ>0erg(f)\mu\in\mathcal{M}^{\mathrm{erg}}_{\vartheta>0}(f). For a lift γ~\widetilde\gamma of γ\gamma, define

VC(γ~)={x~S~d(x~,γ~)<R}.V_C(\widetilde\gamma)=\{\widetilde x\in\widetilde S\mid d(\widetilde x,\widetilde\gamma)<R\}.

Bounded-deviation strengthening. There exists C>0C>0 such that if an orbit y~,,f~n0(y~)\widetilde y,\dots,\widetilde f^{n_0}(\widetilde y) of f~\widetilde f crosses VC(γ~)V_C(\widetilde\gamma) for some lift γ~\widetilde\gamma of γ\gamma, then there exists an ff-periodic orbit with one lift to S~\widetilde S having its tracking geodesic intersecting γ~\widetilde\gamma.

This strengthens the preceding bounded-deviations theorem by replacing crossings of many different lifts with a crossing of a prescribed neighborhood of one lift. The conjecture is presented under the additional inessentiality assumption on contractible fixed points; no resolution is supplied in the source.

Sources & referencesView supporting material

Primary source

Pierre-Antoine Guihéneuf and Fábio Armando Tal, “Bounded deviations in higher genus I: closed geodesics”, arXiv:2511.14222 (2026).

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