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Kommende Vorträge

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Ausführliche Liste aller demnächst stattfindenden Vorträge und Seminare. Für eine Übersicht konsultieren Sie bitte auch den Kalender.

Bonn Symplectic Seminar

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Organiser(s): 
Nate Bottman
Datum: 
Don, 26/09/2024 - 11:00 - Die, 01/04/2025 - 12:00
Location: 
MPIM Seminar Room

Knotted families of arcs

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Speaker: 
Danica Kosanović
Zugehörigkeit: 
ETH Zürich
Datum: 
Die, 18/02/2025 - 11:00 - 12:00
Location: 
MPIM Lecture Hall
Parent event: 
Informal topology seminar

I will outline a construction of multi-parameter families of arcs in 4-manifolds, and explain how some spectral sequence calculations can show their nontriviality.

Geometric Langlands Seminar

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Speaker: 
Dennis Gaitsgory
Zugehörigkeit: 
MPIM
Datum: 
Die, 18/02/2025 - 16:00 - 18:00
Location: 
MPIM Lecture Hall
Parent event: 
Geometric Langlands seminar

Zoom link:

https://eu02web.zoom-x.de/j/66594302263?pwd=6XqRNiAADoXfsLNrwCIji5UZgyh2jG.1

Meeting ID: 665 9430 2263
Passcode: 740104

 

Knutson's Conjecture on the Representation Ring

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Speaker: 
Diego Martin Duro
Zugehörigkeit: 
Warwick
Datum: 
Mit, 19/02/2025 - 11:00 - 12:00
Location: 
MPIM Seminar Room
Parent event: 
Algebra Seminar

Donald Knutson’s Conjecture, later refined by Savitskii, stated that for every irreducible character of a finite group, there exists a virtual character such that their tensor product results in the regular character. The original conjecture was disproven by Savitskii, and we revisit the arguments and counterexamples provided.

On extreme values of L-functions of newforms

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Speaker: 
Rashi Lunia
Zugehörigkeit: 
MPIM
Datum: 
Mit, 19/02/2025 - 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

In 2008, Soundararajan introduced the resonance method to study extreme values of certain families of $L$-functions. In this talk we report on a recent work with Sanoli Gun where we use the resonance method to study how often the $L$-functions attached to normalized Hecke eigenforms take large values at the central critical point. 

 

Kobayashi-Hitchin correspondence for polarized fibrations

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Speaker: 
Finski Siarhei
Zugehörigkeit: 
Ecole Polytechnique, Palaiseau/MPIM
Datum: 
Don, 20/02/2025 - 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
MPI-Oberseminar

A Hermitian metric on a holomorphic vector bundle is said to be Hermite-Einstein if its mean curvature is proportional to the identity operator. The Kobayashi-Hitchin correspondence (or the Donaldson-Uhlenbeck-Yau theorem) asserts that a holomorphic vector bundle admits a Hermite-Einstein metric if and only if it satisfies the algebraic condition of slope polystability.

Density functions for filtrations of homogeneous ideals

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Speaker: 
Hoang Le Truong
Zugehörigkeit: 
Vietnam Academy of Science and Technology
Datum: 
Die, 25/02/2025 - 14:00 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Algebra Seminar

A density function for an algebraic invariant is a measurable function on $\mathbb{R}$ that evaluates the invariant on a real scale. This approach encapsulates richer information about the invariant without requiring additional data. In this talk, we introduce and develop density functions $f_{I_n}$ corresponding to filtrations $\left\{I_n\right\}_{n \in \mathbb{N}}$ of graded ideals within a standard graded domain $A$. This is joint work with Suprajo Das and Sudeshna Roy.

tba (Geometric Langlands Seminar)

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Speaker: 
Arnaud Eteve
Zugehörigkeit: 
MPIM
Datum: 
Die, 25/02/2025 - 16:00 - 18:00
Location: 
MPIM Lecture Hall
Parent event: 
Geometric Langlands seminar

Zoom link:

https://eu02web.zoom-x.de/j/66594302263?pwd=6XqRNiAADoXfsLNrwCIji5UZgyh2jG.1

Meeting ID: 665 9430 2263
Passcode: 740104

 

Bounds for Kloosterman Sums for $\mathrm{GL}_n$

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Speaker: 
Johannes Linn
Zugehörigkeit: 
MPIM
Datum: 
Mit, 26/02/2025 - 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

Classical Kloosterman sums defined by $S(m,n;c):=\sum_{x\in (\mathbb{Z}/c\mathbb{Z})^*}e\Big(\frac{mx+n\overline{x}}{c}\Big)$ for $m,n\in\mathbb{Z}$ and $c\in\mathbb{Z}^+$ have become ubiquitous in Number Theory appearing for example in Fourier coefficients of classical Poincaré series and therefore in the geometric side of relative trace formulae of Petersson-Kuznetsov type.
Working with relative trace formulae over $\mathrm{GL}_n$ requires understanding of more general Kloosterman sums.

Witten zeta function at negative integers

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Speaker: 
Kam Cheong Au
Zugehörigkeit: 
Universität zu Köln
Datum: 
Mit, 05/03/2025 - 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar
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