Geodesic ray transform with matrix weights for piecewise constant functions

Abstract

We show injectivity of the geodesic X-ray transform on piecewise constant functions when the transform is weighted by a continuous matrix weight. The manifold is assumed to be compact and nontrapping of any dimension, and in dimension three and higher we assume a foliation condition. We make no assumption regarding conjugate points or differentiability of the weight. This extends recent results for unweighted transforms.

10 pages, 1 figure; accepted manuscript (to appear in Ann. Acad. Sci. Fenn. Math.)