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Journal of Convex Analysis 24 (2017), No. 2, 645--660 Copyright Heldermann Verlag 2017 Convex Surfaces with Planar Polar Sets and Point-Source Shadow-Boundaries Valeriu Soltan Department of Mathematical Sciences, George Mason University, 4400 University Drive, Fairfax, VA 22030, U.S.A. vsoltan@gmu.edu Generalizing certain characteristic properties of ellipsoids, we describe all convex hypersurfaces in the n-dimensional real space, possibly unbounded, whose polar sets and point-source shadow-boundaries satisfy planarity conditions. Keywords: Body, convex, ellipsoid, polar set, quadric hypersurface, shadow-boundary, solid. MSC: 52A20 [ Fulltext-pdf (163 KB)] for subscribers only. |