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Weighted Radon transforms and first order differential systems on the plane
Roman Novikov1

We consider weighted Radon transforms on the plane, where weights are given as finite Fourier series in angle variable. By means of additive Riemann-Hilbert problem techniques, we reduce inversion of these transforms to solving first order differential systems on $\R^2=\C$ with a decay condition at infinity. As a corollary, we obtain new injectivity and inversion results for weighted Radon transforms on the plane.
1:  CMAP - Centre de Mathématiques Appliquées - Ecole Polytechnique