Duanzhi Zhang

collaborators

2 papers

math.DS2019

Elliptic and non-hyperbolic closed characteristics on compact convex P-cyclic symmetric hypersurfaces in $R^{2 n}$

Hui Liu, Chongzhi Wang, Duanzhi Zhang

Let $Σ$ be a compact convex hypersurface in $R^{2 n}$ which is P-cyclic symmetric, i.e., $x \in Σ$ implies $P x \in Σ$ with P being a $2 n \times 2 n$ symplectic orthogonal matrix and…

math.DS2015

Stable P-symmetric closed characteristics on partially symmetric compact convex hypersurfaces

Hui Liu, Duanzhi Zhang

In this paper, let $n \geq 2$ be an integer, $P = d ia g (- I_{n - κ}, I_{κ}, - I_{n - κ}, I_{κ})$ for some integer $κ \in [0, n - 1)$ , and $Σ \subset R^{2 n}$ be a partially symmetric compact convex…

Elliptic and non-hyperbolic closed characteristics on compact convex P-cyclic symmetric hypersurfaces in R2n

Stable P-symmetric closed characteristics on partially symmetric compact convex hypersurfaces

Elliptic and non-hyperbolic closed characteristics on compact convex P-cyclic symmetric hypersurfaces in $R^{2 n}$