Departement Mathematik

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Zurich graduate colloquium

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Frühjahrssemester 2025

Datum / Zeit Referent:in Titel Ort
4. März 2025
16:30-18:30 		Stefano Galanda
Dipartimento di matematica - DIMA, Universita di Genova
Details

Zurich Graduate Colloquium

Titel What is... Algebraic Quantum Field Theory?
Referent:in, Affiliation Stefano Galanda, Dipartimento di matematica - DIMA, Universita di Genova
Datum, Zeit 4. März 2025, 16:30-18:30
Ort KO2 F 150
Abstract The Algebraic approach to quantum theories was developed in the end of last century in order to provide a solid mathematical description to the theory of the standard model of particle physics and especially its generalization on curved spacetime backgrounds. Despite its original purpose, the formalism also emerged as a suitable framework for formulating the thermodynamic limit of models in statistical mechanics. The goal of this talk is to provide a gentle introduction to the algebraic approach by first presenting its main motivations and then outlining some of its mathematical foundations. In particular, we will present this approach as an abstract generalization of the mathematical framework of Quantum Mechanics.
What is... Algebraic Quantum Field Theory?read_more
KO2 F 150
18. März 2025
16:30-18:30 		Baptiste Seraille
ETH
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Zurich Graduate Colloquium

Titel What is... the Anosov-Katok Construction?
Referent:in, Affiliation Baptiste Seraille, ETH
Datum, Zeit 18. März 2025, 16:30-18:30
Ort KO2 F 150
Abstract In this talk I will present the Anosov-Katok construction and motivate it by presenting/recalling celebrated results of Poincaré, Birkhoff and Franks. If time permits we will see some recent applications of this construction in the field of symplectic topology.
What is... the Anosov-Katok Construction?read_more
KO2 F 150
25. März 2025
16:30-18:30 		Barbara Palumbo
University of Genoa
Details

Zurich Graduate Colloquium

Titel What is... Applied Mathematics in Solar Physics?
Referent:in, Affiliation Barbara Palumbo, University of Genoa
Datum, Zeit 25. März 2025, 16:30-18:30
Ort KO2 F 150
Abstract In this talk, I will present my research on the application of mathematical techniques to the analysis of data from STIX and HXI, two indirect imagers that measure X-rays emitted by the Sun during solar flares. The presentation will introduce the underlying physical problem, followed by a mathematical formulation that leads to an ill-posed inverse problem. I will discuss the stability of the problem and explore suitable algorithms for its solution. Finally, I will showcase preliminary reconstructions obtained by applying these methods to real observational data.
What is... Applied Mathematics in Solar Physics?read_more
KO2 F 150
1. April 2025
16:30-18:30 		Tobias Bisang
Universität Basel
Details

Zurich Graduate Colloquium

Titel What is... the Manin-Mumford conjecture?
Referent:in, Affiliation Tobias Bisang, Universität Basel
Datum, Zeit 1. April 2025, 16:30-18:30
Ort KO2 F 150
Abstract This talk is about the Manin-Mumford conjecture, which was proven by M. Raynaud in 1983. The required theory will be presented, including abelian varieties. The first and simplest version of the theorem is as follows: Given a nonzero \(f\in\mathbb{C}[X,Y]\), there exist only finitely many pairs \((q_1,q_2)\in\mathbb{Q}\) with \(f(\mathrm{e}^{2\pi\mathbf{i}q_1},\mathrm{e}^{2\pi\mathbf{i}q_2})=0\), unless there is a very special reason: \(f\) contains a factor of the form \(X^nY^m-\mathrm{e}^{2\pi\mathbf{i}q}\) or \(X^n-Y^m\mathrm{e}^{2\pi\mathbf{i}q}\).
What is... the Manin-Mumford conjecture?read_more
KO2 F 150
8. April 2025
16:30-18:30 		Jasmin Jörg
Unversität Bern
Details

Zurich Graduate Colloquium

Titel What is... the crossing number of curves on surfaces?
Referent:in, Affiliation Jasmin Jörg, Unversität Bern
Datum, Zeit 8. April 2025, 16:30-18:30
Ort KO2 F 150
Abstract Fixing a closed surface and a number \(k\), we ask: How many crossings do any \(k\) non-homotopic simple closed curves on the surface necessarily create? In this talk, we focus on small minimising systems on a surface of genus 2 and relate them to optimal curve systems appearing in other contexts. If time allows, we discuss more general results concerning higher genus surfaces and asymptotic behaviour.
What is... the crossing number of curves on surfaces?read_more
KO2 F 150
15. April 2025
16:30-18:30 		Barbara Betti
MPI MiS Leipzig
Details

Zurich Graduate Colloquium

Titel What is... a Khovanskii basis?
Referent:in, Affiliation Barbara Betti, MPI MiS Leipzig
Datum, Zeit 15. April 2025, 16:30-18:30
Ort KO2 F 150
What is... a Khovanskii basis?
KO2 F 150
6. Mai 2025
16:30-18:30 		Samuel Koovely
Universität Zürich
Details

Zurich Graduate Colloquium

Titel What is... Free Convolution?
Referent:in, Affiliation Samuel Koovely, Universität Zürich
Datum, Zeit 6. Mai 2025, 16:30-18:30
Ort KO2 F 150
What is... Free Convolution?
KO2 F 150
13. Mai 2025
16:30-18:30 		Luca Rubio
ETH
Details

Zurich Graduate Colloquium

Titel What is... the distribution of p-tower groups?
Referent:in, Affiliation Luca Rubio, ETH
Datum, Zeit 13. Mai 2025, 16:30-18:30
Ort KO2 F 150
What is... the distribution of p-tower groups?
KO2 F 150
27. Mai 2025
16:30-18:30 		Jana Göken
Kiel University
Details

Zurich Graduate Colloquium

Titel What is...a Torsionfree Lattice of Minimal Covolume in a Simpe Lie Group?
Referent:in, Affiliation Jana Göken, Kiel University
Datum, Zeit 27. Mai 2025, 16:30-18:30
Ort KO2 F 150
What is...a Torsionfree Lattice of Minimal Covolume in a Simpe Lie Group?
KO2 F 150

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