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On the light ray transform of wave equation solutions

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arxiv 1912.02848 v2 pith:DAHN2ER3 submitted 2019-12-05 math.AP

On the light ray transform of wave equation solutions

classification math.AP
keywords lighttransformsolutionswaveactingbecauseconnectioncosmology
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We study the light ray transform on Minkowski space-time and its small metric perturbations acting on scalar functions which are solutions to wave equations. We show that the light ray transform uniquely determines the function in a stable way. The problem is of particular interest because of its connection to inverse problems of the Sachs-Wolfe effect in cosmology.

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