Volume properties and some characterizations of ellipsoids in ${\Bbb E}^{n+1}$

Authors: DONG-SOO KIM, INCHEON KIM, YOUNG HO KIM

Abstract: Suppose that $M$ is a strictly convex and closed hypersurface in ${\Bbb E}^{n+1}$ with the origin $o$ in its interior. We consider the homogeneous function $g$ of positive degree $d$ satisfying $M=g^{-1}(1)$. Then, for a positive number $h$ the level hypersurface $g^{-1}(h)$ of $g$ is a homothetic hypersurface of $M$ with respect to the origin $o$. In this paper, for tangent hyperplanes $\Phi_h$ to $g^{-1}(h)$ ($0

Keywords: Ellipsoid, proper affine hypersphere, volume, cone, strictly convex, homothetic hypersurface, Gauss-Kronecker curvature

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