Oberseminar Dynamische Systeme
Alberto Abbondandolo, Luca Asselle, Barney Bramham
Gerhard Knieper, Stefan Suhr, Kai Zehmisch



Vorträge im SS 2022

  • 10.05.2022 Yann Chaubet (Paris)
  • Counting closed geodesics under intersection constraints

  • 17.05.2022 Alessandro Portaluri (Torino)
  • An index theory for asymptotic motions in the gravitational N-body problem

  • 05.07.2022 Erman Cineli (Paris)
  • Topological entropy and Floer theory

  • 12.07.2022 Jakob Hedicke (RUB)
  • On the global hyperbolicity of the positively elliptic region



Vorträge im WS 2021/22

  • 12.10.2021 Yaniv Ganor (Tel Aviv)
  • Big Fiber Theorems and Ideal-Valued Measures in Symplectic Topology

  • 09.11.2021 Michael Khanevsky (Technion)
  • Geometry of non-chaotic Hamiltonian diffeomorphisms on surfaces

  • 16.11.2021 Rohil Prasad (Princeton)
  • Invariant probability measures from pseudoholomorphic curves

  • 11.01.2022 Shahriar Aslani (ENS Paris)
  • Mañe generic properties of non-convex Hamiltonian

  • 18.01.2022 Thibault Lefeuvre (Paris)
  • On the ergodicity of the frame flow on negatively-curved manifolds



Vorträge im SS 2021

  • 27.04.2021 Alexandre Jannaud (Neuchâtel)
  • Dehn-Seidel twist, C^0 symplectic geometry and barcodes

  • 04.05.2021 Tobias Weich (Paderborn)
  • SRB measures for Anosov actions

  • 25.05.2021 Comlan E. Koudjinan (IST, Austria)
  • Some applications of KAM Theory to billiards

  • 15.06.2021 Georgios Dimitroglou Rizell (Uppsala)
  • Lagrangian Unlinking and Recurrence



Vorträge im WS 2020/21

  • 27.10.2020 Shira Tanny (Tel Aviv)
  • The Poisson bracket invariant: soft and hard approaches

  • 10.11.2020 Bernd Stratmann (Bochum)
  • Nowhere vanishing primitive of a symplectic form and removing parametrized rays symplectically

  • 17.11.2020 Matthias Meiwes (Aachen)
  • Hofer's geometry and entropy

  • 01.12.2020 Samuel Lisi (Oxford US)
  • Spinal Open Book Decompositions

  • 08.12.2020 Benoit Joly (Paris)
  • Dynamical construction of barcodes of Hamiltonian homeomorphisms of surfaces

  • 15.12.2020 Otto van Koert (Seoul)
  • A generalization of the Poincare-Birkhoff fixed point theorem and the restricted three-body problem

  • 12.01.2021 Johanna Bimmermann (Heidelberg)
  • On the Hofer-Zehnder capacity for twisted tangent bundles over closed surfaces

  • 19.01.2021 Lucas Dahinden (Heidelberg)
  • Introducing sub-Riemannian Billiards



Vorträge im SS 2020

  • 30.06.2020 Pierre Dehornoy (Grenoble)
  • Transverse surfaces and broken book decompositions



Vorträge im WS 2019/20

  • 15.10.2019 Simon Allais (Lyon)
  • Application of generating functions to symplectic and contact rigidity

  • 22.10.2019 Christian Lange (Köln)
  • Rigidity of Zoll magnetic systems on surfaces

  • 05.11.2019 Beatrice Pozzetti (Heidelberg)
  • Orbit growth rate in higher rank Teichmüller theories

  • 19.11.2019 Nikhil Savale (Köln)
  • Sub-leading asymptotics of ECH capacities

  • 10.12.2019 Ettore Minguzzi (Florenz)
  • A gravitational collapse singularity theorem consistent with black hole evaporation and chronology violation

  • 10.12.2019 Wolfgang Schmaltz (Giessen)
  • The Steenrod problem for orbifolds and polyfold Gromov-Witten invariants

  • 14.01.2020 Will Merry (ETH)
  • Symplectic cohomology of magnetic cotangent bundles

  • 21.01.2020 Annegret Burtscher (Nijmegen)
  • On the metric structure and convergence of spacetimes

  • 21.01.2020 Dario Corona (Camerino)
  • Orthogonal Geodesics Trajectories in Manifolds with Boundary

  • 28.01.2020 Gleb Smirnov (ETH)
  • Symplectic triangle inequality

  • 28.01.2020 Stephan Mescher (Leipzig)
  • Spherical complexities and closed geodesics



Vorträge im SS 2019:

  • 30.04.2019 Anna Florio (Université d'Avignon)
  • Torsion of C^1 surface diffeomorphisms and homoclinic transverse intersections

  • 14.05.2019 Michela Egidi (TU Dortmund)
  • On eigenvalue estimates of the magnetic Laplacian on a Riemannian manifold

  • 28.05.2019 Paolo Giulietti (De Giorgi Center, Pisa)
  • A transfer operator approach to study statistical properties of parabolic flows

  • 04.06.2019 Albert Fathi (Georgia Tech, Atlanta)
  • Recurrence on abelian cover. Application to closed geodesics in manifolds of negative curvature.

  • 11.06.2019 Egor Shelukhin (Montreal)
  • Symplectic cohomology and a conjecture of Viterbo

  • 18.06.2019 Agustin Moreno (Augsburg)
  • 5-dimensional Bourgeois contact structures are always tight

  • 25.06.2019 Nils Waterstraat (Halle)
  • On the Fredholm Lagrangian Grassmannian, SpectralFlow and ODEs in Hilbert Spaces

  • 25.06.2019 Jacobo Pejsachowicz (Torino)
  • Topology and Bifurcation

  • 16.07.2019 Sigurður Freyr Hafstein (Reykjavík)
  • Numerical methods for computing Lyapunov functions



Vorträge im WS 2018/19:

  • 16.10.2018: Egor Shelukhin (Montreal)
  • On the Lagrangian spectral norm and barcodes

  • 23.10.2018: Luca Asselle (Giessen)
  • On Zoll magnetic flows on the two-torus

  • 13.11.2018 Yaniv Ganor (Tel Aviv)
  • A homotopical viewpoint at the Poisson bracket invariants for tuples of sets

  • 20.11.2018 Jaime Bustillo (ENS, Paris)
  • A coisotropic non-­squeezing theorem in symplectic geometry

  • 04.12.2018 Naiara Vergian de Paulo Costa (Santa Catarina)
  • Systems of Transverse Sections for Hamiltonian Flows

  • 13.12.2018 Keon Choi (São Paulo)
  • Embedded contact homology and symplectic embedding problems

  • 15.01.2019 Colin Guillarmou (Orsay)
  • On the marked length spectrum of Anosov manifolds

  • 22.01.2019 Francisco Javier Torres de Lizaur (MPI, Bonn)
  • Invariant measures of divergence free flows and the Seiberg-Witten equations

  • 29.01.2019 Agustin Moreno (Augsburg)
  • Planarity in higher-dimensional contact manifolds

  • 29.01.2019 Rodolfo Rios Zertuche (ENS, Paris)
  • Variations of curves: wiggling and beyond



Vorträge im SS 2018:

  • Erasmo Caponio (Politecnico di Bari)
  • On the existence of harmonic coordinates on Finsler manifolds

  • Stephan Mescher (Universität Leipzig)
  • Topological complexity of symplectic manifolds

  • Norbert Peyerimhoff (Durham University)
  • On Ollivier-Ricci curvature and Bonnet-Myers sharp graphs

  • Maciej Starostka (RUB)
  • A one-dimensional toy model for Seiberg-Witten theory

  • Philipp Kunde (Universität Hamburg)
  • Real-analytic AbC-constructions

  • Gabriele Benedetti (Heidelberg)
  • Magnetic flows on surfaces and their curvature

  • Egor Shelukhin (Montreal)
  • On barcodes in symplectic topology

  • Jungsoo Kang (Seoul)
  • A contact systolic inequality in dimension three

  • Andrea Mondino (Warwick)
  • Some smooth applications of non-smooth Ricci curvature lower bounds

  • Leonid Ryvkin (RUB)
  • Darboux type theorems in multisymplectic geometry

  • Vaughn Climenhaga (University of Houston)
  • Unique equilibrium states for geodesic flows in nonpositive curvature

  • Leonid Polterovich (Tel Aviv University)
  • Quantum manifold learning



Vorträge im WS 2017/18:

  • Carsten Haug (Universität Neuchatel)
  • On action selectors

  • Seongchan Kim (Universität Augsburg)
  • J^+-like invariants and the restricted three body problem

  • Marco Mazzucchelli (ENS Lyon)
  • On the boundary rigidity problem for surfaces

  • Daniel Rosen (Tel Aviv University)
  • Dual caustics in Minkowski billiards

  • Stefano Luzzatto (ICTP, Trieste)
  • Physical measures for dynamical systems

  • Felix Schmäschke (Humboldt-Universität Berlin)
  • On geodesic flows with symmetries and closed magnetic geodesics on orbifolds

  • Luis Diogo (Uppsala University)
  • Lifting Lagrangians from Donaldson-type divisors

  • Christian Gloy (Universität Hamburg)
  • Overtwisted contact structures in dimension three

  • Robert Krawczyk (Universität Gdansk)
  • Homoclinic orbits for an almost periodically Newtonian system in R^3

  • Marie-Claude Arnaud (Université d'Avignon)
  • Arnol’d-Liouville theorems in low regularity

  • Christoph Thäle (RUB)
  • Random Surfaces

  • Arnaud Maret (ETH Zürich)
  • Forcing relations for periodic orbits