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Geometry graduate colloquium

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Frühjahrssemester 2025

Datum / Zeit Referent:in Titel Ort
27. Februar 2025
16:15-17:15 		Dr. Dorian Martino
ETH Zurich, Switzerland
Details

Geometry Graduate Colloquium

Titel Topology, curvature and conformal structure
Referent:in, Affiliation Dr. Dorian Martino, ETH Zurich, Switzerland
Datum, Zeit 27. Februar 2025, 16:15-17:15
Ort HG G 19.2
Topology, curvature and conformal structure
HG G 19.2
6. März 2025
16:15-17:15 		Misha Schmalian
University of Oxford
Details

Geometry Graduate Colloquium

Titel Anosov Flows and the L-Space Conjecture
Referent:in, Affiliation Misha Schmalian, University of Oxford
Datum, Zeit 6. März 2025, 16:15-17:15
Ort HG G 19.2
Abstract When studying dynamics on 3-manifolds a natural question is which 3-manifolds admit Anosov flows and if so how many such flows there are. This question remains open but substantial progress has been made in particular due to Anosov flows interacting well with one of the central questions in low-dimensional topology - the L-space conjecture. We will give an elementary introduction to the field and survey several recent results using these ideas.
Anosov Flows and the L-Space Conjectureread_more
HG G 19.2
13. März 2025
16:15-17:15 		Michele Caselli
Università di Pisa
Details

Geometry Graduate Colloquium

Titel Heat kernel, massive sets, and bounded harmonic functions on noncompact Riemannian manifolds
Referent:in, Affiliation Michele Caselli, Università di Pisa
Datum, Zeit 13. März 2025, 16:15-17:15
Ort HG G 19.2
Heat kernel, massive sets, and bounded harmonic functions on noncompact Riemannian manifolds
HG G 19.2
20. März 2025
16:15-17:15 		Manisha Garg
University of Illinois
Details

Geometry Graduate Colloquium

Titel Assouad-Nagata Dimension and Asymptotic Dimension
Referent:in, Affiliation Manisha Garg, University of Illinois
Datum, Zeit 20. März 2025, 16:15-17:15
Ort HG G 19.2
Assouad-Nagata Dimension and Asymptotic Dimension
HG G 19.2
27. März 2025
16:15-17:15 		Ulysse Remfort-Auray
Institut de Mathématiques de Marseille
Details

Geometry Graduate Colloquium

Titel Quasi-isometrically embedded subgroups and dynamics on character varieties
Referent:in, Affiliation Ulysse Remfort-Auray, Institut de Mathématiques de Marseille
Datum, Zeit 27. März 2025, 16:15-17:15
Ort HG G 19.2
Abstract Let S be a closed surface of genus g > 1. A classical theorem due to Fricke asserts that the mapping class group of S acts properly discontinuously on its Teichmüller space. This group action can be viewed from an algebraic perspective by examining the natural action by precomposition of Out(π₁(S)) on the set of conjugacy classes of discrete and faithful representations of π₁(S) into PSL₂(ℝ). In this talk, we will introduce these fundamental objects, clarify the aforementioned identifications, and prove a generalization of Fricke's theorem using exclusively Gromov-hyperbolic geometry.
Quasi-isometrically embedded subgroups and dynamics on character varietiesread_more
HG G 19.2
3. April 2025
16:15-17:15 		Giacomo Cozzi
Università degli Studi di Padova
Details

Geometry Graduate Colloquium

Titel Gradient Flows of Nonlocal Energies
Referent:in, Affiliation Giacomo Cozzi, Università degli Studi di Padova
Datum, Zeit 3. April 2025, 16:15-17:15
Ort HG G 19.2
Abstract The aim of this talk is to present the theory of gradient flows on metric space. Given a functional defined on a Hilbert space, its gradient flow is the curve minimizing the functional in the fastest way possible, namely, following the opposite direction of its gradient. Starting from the pioneristic work of De Giorgi, it became possible to give a meaning to gradient flows even in spaces where the definition of gradient is not natural (i.e. on spaces which are not Hilbert). An important application is the case of gradient flows defined on the space of probability measures endowed with the Wasserstein distance. Using this theory, we will discuss two examples in which the functionals to be minimized are nonlocal (i.e., long range interaction) energies.
Gradient Flows of Nonlocal Energiesread_more
HG G 19.2
17. April 2025
16:15-17:15 		Yuval Yifrach
Universität Zürich
Details

Geometry Graduate Colloquium

Titel k-divergence
Referent:in, Affiliation Yuval Yifrach, Universität Zürich
Datum, Zeit 17. April 2025, 16:15-17:15
Ort HG G 19.2
Abstract Given a one parameter flow a(t,x) on a space X, divergent points are points whose flow under a(t) diverges in X. The notion of k divergence is an extension of the notion of divergent orbits. For every natural k, roughly, the set of k divergent points is defined inductively as the set of points which accumulate precisely on the set of k-1-divergent points. We discuss fundamental properties of this set, including the fact that it is not empty, and its Hausdorff dimension. To acquire these properties we use methods of parametric geometry of numbers. This talk is based on a joint work with Anurag Rao, Guy Lachman and Uri Shapira.
k-divergenceread_more
HG G 19.2
* 28. April 2025
16:15-17:15 		Gianmarco Caldini
University of Trento
Details

Geometry Graduate Colloquium

Titel Title T.B.A.
Referent:in, Affiliation Gianmarco Caldini, University of Trento
Datum, Zeit 28. April 2025, 16:15-17:15
Ort HG G 19.2
Title T.B.A.
HG G 19.2
8. Mai 2025
16:15-17:15 		Nicole Müller
Goethe Universität Frankfurt
Details

Geometry Graduate Colloquium

Titel Modular embeddings of Teichmüller curves and modular forms
Referent:in, Affiliation Nicole Müller, Goethe Universität Frankfurt
Datum, Zeit 8. Mai 2025, 16:15-17:15
Ort HG G 19.2
Modular embeddings of Teichmüller curves and modular forms
HG G 19.2
15. Mai 2025
16:15-17:15 		David Urech
ETH Zurich, Switzerland
Details

Geometry Graduate Colloquium

Titel Title T.B.A.
Referent:in, Affiliation David Urech, ETH Zurich, Switzerland
Datum, Zeit 15. Mai 2025, 16:15-17:15
Ort HG G 19.2
Title T.B.A.
HG G 19.2
22. Mai 2025
16:15-17:15 		Nastaran Einabadi
IMJ-PRG
Details

Geometry Graduate Colloquium

Titel The fine curve graph and rotation theory on surfaces
Referent:in, Affiliation Nastaran Einabadi, IMJ-PRG
Datum, Zeit 22. Mai 2025, 16:15-17:15
Ort HG G 19.2
The fine curve graph and rotation theory on surfaces
HG G 19.2

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