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A dihedral Bott-type iteration formula and stability of symmetric periodic orbits
- Xijun Hu, A. Portaluri, Ran Yang
- Mathematics
- 25 May 2017
Motivated by the recent discoveries on the stability properties of symmetric periodic solutions of Hamiltonian systems, we establish a Bott-type iteration formula for dihedraly equivariant…
A novel memcapacitor and its application in a chaotic circuit
- M. Guo, Ran Yang, Meng Zhang, Renyuan Liu, Yongliang Zhu, G. Dou
- PhysicsNonlinear Dynamics
- 28 June 2021
Morse Index Theorem of Lagrangian Systems and Stability of Brake Orbit
In this paper, we prove Morse index theorem of Lagrangian systems with self-adjoint boundary conditions. Based on it, we give some nontrivial estimates on the difference of Morse indices. As an…
Bott-type iteration, Instability and Spectral Flow formula for semi-Riemannian closed geodesics
- Xijun Hu, A. Portaluri, Ran Yang
- Mathematics
- 23 June 2017
Linear instability for periodic orbits of non-autonomous Lagrangian systems
- A. Portaluri, Li Wu, Ran Yang
- Mathematics
- 12 July 2019
Inspired by the classical Poincaré criterion about the instability of orientation preserving minimizing closed geodesics on surfaces, we investigate the relation intertwining the instability and the…
Linear instability of periodic orbits of free period Lagrangian systems
- A. Portaluri, Li Wu, Ran Yang
- Mathematics
- 24 September 2021
In this paper we provide a sufficient condition for the linear instability of a periodic orbit for a free period Lagrangian system on a Riemannian manifold. The main result establish a general…
Instability of semi-Riemannian closed geodesics
- Xijun Hu, A. Portaluri, Ran Yang
- MathematicsNonlinearity
- 23 June 2017
A celebrated result due to Poincare affirms that a closed non-degenerate minimizing geodesic $\gamma$ on an oriented Riemannian surface is hyperbolic. Starting from this classical theorem, our first…
Stability and convergence analysis of adaptive BDF2 scheme for the Swift-Hohenberg equation
- Hong Sun, Xuan Zhao, Haiyan Cao, Ran Yang, M. Zhang
- Communications in Nonlinear Science and Numerical…
- 1 March 2022