A Support Characterization for Functions on the Unit Sphere with Vanishing Integrals Arising from Tangent Planes to a Given Surface

Abstract

Let $\Sigma$ be an axially symmetric, smooth, closed hypersurface in ${\mathbb{R}}^{n+1}$ with a simply connected interior which is contained inside the unit sphere ${\mathbb{S}}^n$. For a continuous function $f$, which is defined on ${\mathbb{S}}^n$, the main goal of this paper is to characterize the support of $f$ in case where its integrals vanish on subspheres obtained by intersecting ${\mathbb{S}}^n$ with the tangent hyperplanes of a certain subdomain $\mathcal{U}\subset \Sigma$ of $\Sigma$. We show that the support of $f$ can be characterized in case where its integrals also vanish on subspheres obtained by intersecting ${\mathbb{S}}^n$ with hyperplanes obtained by infinitesimal perturbations of the tangent hyperplanes of $\mathcal{U}$ and where $\mathcal{U}$ satisfies some regularity condition which implies local convexity.

23 pages