@Article{Estrada2016, author = "Estrada, Ricardo", title = "A two cones support theorem", journal = "Opuscula Math.", year = "2016", volume = "36", number = "2", pages = "207--213", doi = "http://dx.doi.org/10.7494/OpMath.2016.36.2.207", url = "http://dx.doi.org/10.7494/OpMath.2016.36.2.207", abstract = "We show that if the Radon transform of a distribution \(f\) vanishes outside of an acute cone \(C_{0}\), the support of the distribution is contained in the union of \(C_{0}\) and another acute cone \(C_{1}\), the cones are in a suitable position, and \(f\) vanishes distributionally in the direction of the axis of \(C_{1}\), then actually \(\operatorname*{supp}f\subset C_{0}\). We show by examples that this result is sharp.", keywords = "Radon transforms, support theorems, distributions", issn = "1232-9274" }