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math.GT2024
Iso-length-spectral Hyperbolic Surface Amalgams
Yandi Wu
Two negatively curved metric spaces are iso-length-spectral if they have the same multisets of lengths of closed geodesics. A well-known paper by Sunada provides a systematic way o…
math.DS2024
Sub-actions for geodesic flows on locally CAT(-1) spaces
David Constantine, Elvin Shrestha, Yandi Wu
We extend a result of Lopes and Thieullen on sub-actions for smooth Anosov flows to the setting of geodesic flow on locally CAT(-1) spaces. This allows us to use arguments original…