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A class of Hessian quotient equations in warped product manifolds

  • Weimin Sheng,
  • Ke Xue

摘要

Given a compact Riemannian manifold M and an open interval I in ℝ, we consider a warped product manifold \(\bar{M}=I \times_{\phi} M\) M ¯ = I × ϕ M . For a positive function f defined on \(\bar{M}\) M ¯ , we obtain the existence of the (η, k)-convex hypersurface Σ which satisfies a Hessian quotient equation \({\sigma_{k}(\lambda(\eta))\over \sigma_{l}(\lambda(\eta))}=f(V, \nu(V))\) σ k ( λ ( η ) ) σ l ( λ ( η ) ) = f ( V , ν ( V ) ) for 0 ⩽ l < k < n, and η = Hgh, the first Newton transformation of the second fundamental form h. This generalizes the result of Chen et al. (2020) and gives a simpler proof of the curvature estimate. As a corollary, we can get an (η, k)-convex solution for \(f(V, \nu)= \langle V, \nu \rangle\vert V \vert^{-n-1}h({V\over \vert V \vert})\) f ( V , ν ) = V , ν | V | n 1 h ( V | V | ) in ℝn+1 for some prescribed function h, which can be viewed as the prescribed curvature measure type problem.