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Geometry graduate colloquium

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Herbstsemester 2024

Datum / Zeit Referent:in Titel Ort
3. Oktober 2024
16:15-17:15 		Marie Abadie
University of Luxembourg
Details

Geometry Graduate Colloquium

Titel Surfaces, graphs and complexes
Referent:in, Affiliation Marie Abadie, University of Luxembourg
Datum, Zeit 3. Oktober 2024, 16:15-17:15
Ort HG G 19.2
Abstract The goal of this talk is to provide a brief overview of the interactions between hyperbolic surfaces and certain combinatorial objects. Specifically, we will explore Brock's combinatorial approach to understanding the coarse geometry of Teichmüller space equipped with the Weil-Petersson metric. This approach revolves around using the pants graph as a combinatorial tool for navigating Teichmüller space. Along the way, we will also encounter the hexagons graph and other related questions.
Surfaces, graphs and complexesread_more
HG G 19.2
10. Oktober 2024
16:15-17:15 		Raphael Appenzeller
Heidelberg University
Details

Geometry Graduate Colloquium

Titel Hyperbolicity and winning strategies in Cops and Robbers games
Referent:in, Affiliation Raphael Appenzeller, Heidelberg University
Datum, Zeit 10. Oktober 2024, 16:15-17:15
Ort HG G 19.2
Abstract Cops and Robbers is a two-player game played on graphs, where one player tries to catch the other, while the other tries to escape. Recently, a version of this game was introduced, where the existence of a winning strategy is invariant under quasi-isometry. This allows to play the game on Cayley-graphs of groups and gives new group invariants. We spotlight some connections between Gromov-hyperbolicity and the existence of winning strategies.
Hyperbolicity and winning strategies in Cops and Robbers gamesread_more
HG G 19.2
17. Oktober 2024
16:15-17:15 		Sophie Schmidhuber
University of Zurich
Details

Geometry Graduate Colloquium

Titel Billiard dynamics and Masur’s Criterion
Referent:in, Affiliation Sophie Schmidhuber, University of Zurich
Datum, Zeit 17. Oktober 2024, 16:15-17:15
Ort HG G 19.2
Abstract In this talk, we will show how the trajectory of a billiard ball on a billiard table with rational angles can be understood via the straight line flow on a translation surface. We will define the geodesic flow for the moduli space of translation surfaces and provide a simple but elegant proof for Masur's Criterion, which states that if the trajectory of a translation surface under the geodesic flow is recurrent, then the vertical straight line flow on the translation surface is uniquely ergodic.
Billiard dynamics and Masur’s Criterionread_more
HG G 19.2
24. Oktober 2024
16:15-17:15 		Cynthia Bortolotto
ETH Zurich
Details

Geometry Graduate Colloquium

Titel On distribution of random chords in the plane
Referent:in, Affiliation Cynthia Bortolotto, ETH Zurich
Datum, Zeit 24. Oktober 2024, 16:15-17:15
Ort HG G 19.2
On distribution of random chords in the plane
HG G 19.2
31. Oktober 2024
16:15-17:15 		Layne Hall
University of Warwick
Details

Geometry Graduate Colloquium

Titel The correspondence between pseudo-Anosov flows and veering triangulations.
Referent:in, Affiliation Layne Hall, University of Warwick
Datum, Zeit 31. Oktober 2024, 16:15-17:15
Ort HG G 19.2
The correspondence between pseudo-Anosov flows and veering triangulations.
HG G 19.2
7. November 2024
16:15-17:15 		Huaitao Gui
University of Copenhagen
Details

Geometry Graduate Colloquium

Titel Injective metric spaces and locally elliptic action
Referent:in, Affiliation Huaitao Gui, University of Copenhagen
Datum, Zeit 7. November 2024, 16:15-17:15
Ort HG G 19.2
Injective metric spaces and locally elliptic action
HG G 19.2
14. November 2024
16:15-17:15 		Laura Lankers
Max Planck Institute for Mathematics in the Sciences, Leipzig
Details

Geometry Graduate Colloquium

Titel Some Higher Teichmüller theory and SO(p,q)
Referent:in, Affiliation Laura Lankers, Max Planck Institute for Mathematics in the Sciences, Leipzig
Datum, Zeit 14. November 2024, 16:15-17:15
Ort HG G 19.2
Some Higher Teichmüller theory and SO(p,q)
HG G 19.2

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