Ordinary differential equations; dynamical systems; difference equations; partial differential equations

1. Chenghua Gao, Xingyue He, Maojun Ran, “On a power-type coupled system of k-hessian equations”, Classification of the radial k-convex solutions for a kind of power-type coupled sustem of k-Hessian equaitons, Quaestiones Mathematicae, onlinear fiest articles:onlinear fiest articles (2020), 1-20
2. Chenghua Gao, Fei Zhang, Ruyun Ma, “Eigenvalues of discrete Sturm-Liouville problems with sign-changing weight and coupled boundary conditions”, Discussed the interlacing properties of the discrete Sturm-Liouville problems with sign-changing weight and coupled boundary conditions, Oper. Matrices, 14:2 (2020), 491-513
3. Chenghua Gao, Li Lv, Yali Wang, “Spectra of a discrete Sturm-Liouville problem with eigenparameter-dependent boundary conditions in Pontryagin space”, Discussed the Sturm theory for the discrete Sturm-Liouville problem with eigenparameter-dependent boundary conditions in Pontryagin space, Quaest. Math., 2:2021 (44), 217-242

• Northwest Normal University, Lanzhou