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arXiv · 2608.24220

The entropy of Gromov-Thurston manifolds and branched coverings

Nicola Cavallucci·Merlin Incerti-Medici
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Abstract

We develop a general theory for the dynamics of the geodesic flow of locally CAT(k) branched coverings and we show that it does not depend on the specific covering but only on the base space, the branching set and the degree of the covering. We find an explicit formula for the entropy: it equals the topological pressure of the associated natural dynamical system on the space of broken geodesics with a natural geometric potential. We find the exact asymptotic of the entropy as the number of sheets of the branched covering goes to infinity, as well as asymptotic properties of the measures of maximal entropy.

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Nicola Cavallucci, Merlin Incerti-Medici. 2026-08-25. The entropy of Gromov-Thurston manifolds and branched coverings. https://arxiv.org/abs/2608.24220

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