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Closed Reeb orbits on contact type hypersurfaces in T^*Sn

2026/03/09 by Huagui Duan, Zihao Qi · 1 voice
Mathematics · #math.SG #math.DS

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Abstract

In this paper, it is proved that under dynamically convex condition, there exist at least [(n+1)/(2)] closed Reeb orbits on a closed contact type hypersurface in T^*Sn enclosing the zero section and bounding a simply connected Liouville domain. Furthermore, if the contact form is non-degenerate and has finitely many closed Reeb orbits, then there exist at least two irrationally elliptic closed Reeb orbits.

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