For even prescribed functions satisfying explicit curvature conditions, the horospherical p-Christoffel-Minkowski equation σ_k(A[φ]) = φ^{p-k} f admits a smooth uniformly h-convex solution φ > 1 on S^n.
Smooth solutions to the Christoffel problem in $\mathbb{H}^{n+1}$
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abstract
The famous Christoffel problem is possibly the oldest problem of prescribed curvatures for convex hypersurfaces in Euclidean space. Recently, this problem has been naturally formulated in the context of uniformly $h$-convex hypersurfaces in hyperbolic space by Espinar-G\'alvez-Mira. Surprisingly, Espinar-G\'alvez-Mira find that the Christoffel problem in hyperbolic space is essentially equivalent to the Nirenberg-Kazdan-Warner problem on prescribing scalar curvature on $\mathbb{S}^n$. This equivalence opens a new door to study the Nirenberg-Kazdan-Warner problem. In this paper, we establish a existence of solutions to the Christoffel problem in hyperbolic space by proving a full rank theorem. As a corollary, a existence of solutions to the Nirenberg-Kazdan-Warner problem follows.
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The horospherical $p$-Christoffel-Minkowski problem in hyperbolic space
For even prescribed functions satisfying explicit curvature conditions, the horospherical p-Christoffel-Minkowski equation σ_k(A[φ]) = φ^{p-k} f admits a smooth uniformly h-convex solution φ > 1 on S^n.