Abstract
Under the assumption that the X-ray transform over symmetric solenoidal 2-tensors is injective, we prove that smooth compact connected manifolds with strictly convex boundary, no conjugate points, and a hyperbolic trapped set are locally marked boundary rigid.
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Notes
This is an elliptic differential operator with zero kernel and cokernel satisfying the Lopatinskii’s transmission condition (see [22, Theorem 3.3.2]). It can thus be used in order to define the scale of Sobolev spaces.
Indeed, \(\tau \mapsto g_\tau \) depends smoothly on \(\tau \), so \(\xi _\tau := \left( \exp _p^{g_\tau }\right) ^{-1}(q)\) depends smoothly on \(\tau \). Thus \((t,\tau ) \mapsto \varphi _t^{g_\tau }(p,\xi _\tau )\) is smooth in both variables and by the implicit function theorem, the length \(l_+^{g_\tau }(p,\xi _\tau )\) is smooth in \(\tau \). Thus, the reparametrized geodesic \(\gamma _\tau \) depends smoothly on \(\tau \)
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Acknowledgements
We warmly thank Colin Guillarmou for fruitful discussions during the redaction of this paper. We are also grateful to the anonymous referee for helpful comments. This research is partially supported by the ERC IPFLOW project.
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Throughout this paper, we shall work in the smooth category, that is all the manifolds and coordinate charts are considered to be smooth.
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Lefeuvre, T. Local Marked Boundary Rigidity Under Hyperbolic Trapping Assumptions. J Geom Anal 30, 448–465 (2020). https://doi.org/10.1007/s12220-019-00149-8
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DOI: https://doi.org/10.1007/s12220-019-00149-8