张端智 男 南开大学数学科学学院教授 博士生导师 研究方向:非线性分析与辛几何 张端智 男 南开大学数学科学学院副教授 研究方向:非线性分析与辛几何 社会兼职: 发表文章及著作: Duanzhi Zhang, $P$-cyclic symmetric closed characteristics on compact convex $P$-cyclic symmetric hypersurface in $\R^{2n}$. To appear in Discrete and Continuous Dynamical System-A. Liu, Chungen; Zhang, Duanzhi Brake orbits in bounded convex symmetric domains. Progress in variational methods, 71-89, Nankai Ser. Pure Appl. Math. Theoret. Phys., 7, World Sci. Publ., Hackensack, NJ, 2011 Zhang, Duanzhi Brake type closed characteristics on reversible compact convex hypersurfaces in $\bold R^{2n}$R2n. Nonlinear Anal. 74 (2011), no. 10, 3149-3158. Zhang, Duanzhi Relative Morse index and multiple brake orbits of asymptotically linear Hamiltonian systems in the presence of symmetries. J. Differential Equations 245 (2008), no. 4, 925-938. Zhang, Duan-zhi Maslov-type index and brake orbits in nonlinear Hamiltonian systems. Sci. China Ser. A 50 (2007), no. 6, 761-772. Zhang, Duanzhi Multiple symmetric brake orbits in bounded convex symmetric domains. Adv. Nonlinear Stud. 6 (2006), no. 4, 643-652. Long, Yiming; Zhang, Duanzhi; Zhu, Chaofeng Multiple brake orbits in bounded convex symmetric domains. Adv. Math. 203 (2006), no. 2, 568-635. Zhang, Duanzhi Multiple brake orbits on convex hypersurfaces under asymmetric pinch conditions. Nonlinear Anal. 61 (2005), no. 6, 919-929.张端智 男 南开大学数学科学学院副教授 研究方向:非线性分析与辛几何 社会兼职: 发表文章及著作: Duanzhi Zhang, $P$-cyclic symmetric closed characteristics on compact convex $P$-cyclic symmetric hypersurface in $R^{2n}$. To appear in Discrete and Continuous Dynamical System-A. Liu, Chungen; Zhang, Duanzhi Brake orbits in bounded convex symmetric domains. Progress in variational methods, 71-89, Nankai Ser. Pure Appl. Math. Theoret. Phys., 7, World Sci. Publ., Hackensack, NJ, 2011 Zhang, Duanzhi Brake type closed characteristics on reversible compact convex hypersurfaces in $bold R^{2n}$R2n. Nonlinear Anal. 74 (2011), no. 10, 3149-3158. Zhang, Duanzhi Relative Morse index and multiple brake orbits of asymptotically linear Hamiltonian systems in the presence of symmetries. J. Differential Equations 245 (2008), no. 4, 925-938. Zhang, Duan-zhi Maslov-type index and brake orbits in nonlinear Hamiltonian systems. Sci. China Ser. A 50 (2007), no. 6, 761-772. Zhang, Duanzhi Multiple symmetric brake orbits in bounded convex symmetric domains. Adv. Nonlinear Stud. 6 (2006), no. 4, 643-652. Long, Yiming; Zhang, Duanzhi; Zhu, Chaofeng Multiple brake orbits in bounded convex symmetric domains. Adv. Math. 203 (2006), no. 2, 568-635. Zhang, Duanzhi Multiple brake orbits on convex hypersurfaces under asymmetric pinch conditions. Nonlinear Anal. 61 (2005), no. 6, 919-929.