Published online by Cambridge University Press: 14 December 2023
In this paper, we study the Dirichlet problem of Hessian quotient equations of the form $S_k(D^2u)/S_l(D^2u)=g(x)$ in exterior domains. For $g\equiv \mbox {const.}$, we obtain the necessary and sufficient conditions on the existence of radially symmetric solutions. For g being a perturbation of a generalized symmetric function at infinity, we obtain the existence of viscosity solutions by Perron’s method. The key technique we develop is the construction of sub- and supersolutions to deal with the non-constant right-hand side g.
Dai is supported by the Shandong Provincial Natural Science Foundation (Grant No. ZR2021MA054). Bao is supported by the Beijing Natural Science Foundation (Grant No. 1222017). Wang is supported by the National Natural Science Foundation of China (Grant Nos. 11971061 and 12271028), the Beijing Natural Science Foundation (Grant No. 1222017), and the Fundamental Research Funds for the Central Universities.