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Conferencias impartidas por Bruno Staffa

On the equidistribution of closed geodesics and geodesic nets

Rice University

Given a Riemannian manifold $(M^n, g)$, it is natural to ask whether it admits any closed geodesics and if so, how many are there and how are they distributed along the manifold.

In this talk, I will present the following result: given a closed 2-manifold $M^2$, for a generic (in the Baire sense) Riemannian metric $g$ on $M^2$ there exists an equidistributed sequence $\{\gamma_i\}_{i \in \mathbb{N}}$ of closed geodesics on $(M^2, g)$.

The same question in a higher dimensional ambient manifold $M^n$ turns out to be much harder and is still widely open. However, we can approach the same problem but considering stationary geodesic nets (which are embedded graphs in $(M, g)$ which are stationary with respect to the length functional) instead of closed geodesics.

Together with Yevgeny Liokumovich, we showed that for a Baire-generic metric $g$ on a fixed closed manifold $M^n$, the union of all embedded stationary geodesic nets on $(M^n, g)$ is dense in $M^n$. I will also present the following stronger result: if $n \geq 3$, given a closed $n$-manifold $M^n$, for a Baire-generic metric $g$ on $M^n$ there exists an equidistributed sequence $\{\gamma_i\}_{i \in \mathbb{N}}$ of stationary geodesic nets on $(M^n, g)$. For $n = 3$, this was joint work with Xinze Li.

Sala de Conferencias (IMAG)

Bruno Staffa

Rice University ()

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This activity is supported by the research projects EUR2024.153556, PID2023-150727NB-I00, , PID2023-151060NB-I00, PID2022-142559NB-I00, CNS2022-135390 CONSOLIDACION2022, PID2020-118137GB-I00, PID2020-117868GB-I00, PID2020-116126GB-I00.