paper

Boundary and lens rigidity for non-convex manifolds

arXiv:1711.10059 · doi:10.1353/ajm.2021.0012

Abstract

We study the boundary and lens rigidity problems on domains without assuming the convexity of the boundary. We show that such rigidities hold when the domain is a simply connected compact Riemannian surface without conjugate points. For the more general class of non-trapping compact Riemannian surfaces with no conjugate points, we show lens rigidity. We also prove the injectivity of the X-ray transform on tensors in a variety of settings with non-convex boundary and, in some situations, allowing a non-empty trapped set.

40 pages, 2 figures

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