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math.DS2026
Yet another characterization of Birkhoff Billiards inside discs
Klaudiusz Czudek, Jacopo De Simoi, Andrew Gad +1
In this short paper, we show a characterization of Birkhoff Billiards inside discs which is related to the expansion of the formal Lazutkin conjugacy at the boundary.
math.DS2025
Statistical properties of mostly expanding fast-slow partially hyperbolic systems
Jacopo De Simoi, Kasun Fernando, Nicholas Fleming-Vázquez
We consider a class of fast-slow partially hyperbolic systems on given by -perturbations of maps where are exp…