A function written as a sum of Laplacian eigenmodes with slowly growing coefficients is identically zero if it vanishes on a space-time cylinder whose duration exceeds the largest geodesic distance to the observation set.
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Uniqueness result for Almost Periodic Distributions depending on time and space and an application to the unique continuation for the wave equation
A function written as a sum of Laplacian eigenmodes with slowly growing coefficients is identically zero if it vanishes on a space-time cylinder whose duration exceeds the largest geodesic distance to the observation set.