The complex Radon correspondence relates an n-dimensional projective space with the Grassmann manifold of its p-dimensional planes. This is the geometric background of the Radon-Penrose transform, which intertwines cohomology classes of homogeneous line bundles with holomorphic solutions to the generalized massless field equations. A good framework to deal with such problems is provided by the recently developed theory of integral transforms for sheaves and \mathcal{D}-modules. In particular, an adjunction formula describes the range of transforms acting on general function spaces, associated with constructible sheaves.
The linear group SL(n+1, C) naturally acts on the Radon correspondence. A distinguished family of function spaces is then the one associated with locally constant sheaves along the closed orbits of the real forms of SL(n+1, C). In this paper, we systematically apply the above-mentioned adjunction formula to such function spaces. We thus obtain in a unified manner several results concerning the complex, conformal, or real Radon transforms.

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