no. 6
On the minimal number of periodic orbits on some hypersurfaces in ℝ 2n
Annales de l'Institut Fourier, Volume 66 (2016) no. 6, pp. 2485-2505.

We study periodic orbits of the Reeb vector field on a nondegenerate dynamically convex starshaped hypersurface in ℝ 2n along the lines of Long and Zhu [24], but using properties of the S 1 - equivariant symplectic homology. We prove that there exist at least n distinct simple periodic orbits on any nondegenerate starshaped hypersurface in ℝ 2n satisfying the condition that the minimal Conley–Zehnder index is at least n-1. The condition is weaker than dynamical convexity.

Nous étudions les orbites périodiques du champ de Reeb sur les hypersurfaces non-dégénérées et dynamiquement convexes de ℝ 2n en suivant les travaux de Long et Zhu mais en utilisant l’homologie symplectique S 1 -équivariante. Nous démontrons qu’il existe au moins n orbites simples de Reeb sur toute hypersurface étoil�e et non dégénérée de ℝ 2n satisfaisant la condition que le plus petit indice de Conley–Zehnder est au moins n-1. Cette dernière condition est plus faible que celle de convexité dynamique.

Received:
Revised:
Accepted:
Published online:
DOI: 10.5802/aif.3069
Classification: 53D10,  37J55
Keywords: Reeb dynamics, Equivariant symplectic homology, Index jump 
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Gutt, Jean; Kang, Jungsoo. On the minimal number of periodic orbits on some hypersurfaces in $\mathbb{R}^{2n}$. Annales de l'Institut Fourier, Volume 66 (2016) no. 6, pp. 2485-2505. doi : 10.5802/aif.3069. https://aif.centre-mersenne.org/articles/10.5802/aif.3069/

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