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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.

Recent developments in Quantum Topology -- Cancelled --

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We will review the basics of quantum topology such as the colored Jones polynomial of a knot, its standard conjectures relating to asymptotics, arithmeticity and modularity, as well as the recent quantum hyperbolic invariants of Kashaev et al, their state-integrals and their structural properties. The course is aimed to be accessible by graduate students and young researchers.

Sites and sheaves

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Speaker: 
Reinier Kramer
Zugehörigkeit: 
MPIM
Datum: 
Mon, 2020-07-13 10:30 - 12:00

I will define sites, i.e. categories with a Grothendieck topology on them. I will give several examples of sites of topological spaces and of schemes. Sites are the right categorical context for sheaf theory, and I will explain how. Finally, I will sketch a proof of Grothendieck's result that representable functors are sheaves in the fpqc topology - and hence also in the fppf and étale topology. This is mostly based on Vistoli's notes, section 2.3.

 

Online: A geometric description of Reidemeister-Turaev Torsion

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Speaker: 
Tatsuro Shimizu
Zugehörigkeit: 
RIMS, Kyoto University
Datum: 
Mon, 2020-07-13 15:00 - 16:00
Parent event: 
MPIM Topology Seminar

Zoom meeting ID: 919-9946-8404
Password: see email announcement or contact the seminar organisers:
Tobias Barthel (barthel.tobi[at]gmail.com)
David Gay (dgay[at]uga.edu)
Arunima Ray (aruray[at]mpim-bonn.mpg.de)

 

ONLINE: Generalized blowup equations

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Speaker: 
Kaiwen Sun
Zugehörigkeit: 
MPIM
Datum: 
Die, 2020-07-14 14:00 - 15:00

Blowup equations as the functional equations for the Nekrasov partition function of 4-dimensional gauge theory was proposed by Nakajima-Yoshioka in 2003. Certain K-theoretic versions were soon later found by Göttsche, Nakajima and Yoshioka. I will talk about two further generalizations found in recent three years, an elliptic version from the viewpoint of gauge theory and a most general version from the viewpoint of topological string theory on local Calabi-Yau threefolds.

ONLINE: Zagier's polylogarithm conjecture and an explicit 4-ratio

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Speaker: 
Steven Charlton
Zugehörigkeit: 
Universität Hamburg
Datum: 
Mit, 2020-07-15 14:30 - 15:30
Parent event: 
Number theory lunch seminar

Zoom Online Meeting ID: 919 6497 4060
For password see the email or contact Pieter Moree (moree@mpim...).

 

ONLINE Reading group: DT invariants, stability conditions and geometry

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Organiser(s): 
Gaetan Borot, Severin Charbonnier, Alessandro Giacchetto, Reinier Kramer and Campbell Wheeler
Zugehörigkeit: 
MPIM
Datum: 
Fre, 2020-04-10 10:00 - 11:30
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Fre, 2020-04-17 10:00 - 11:30
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Fre, 2020-04-24 10:00 - 11:30
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Fre, 2020-05-01 10:00 - 11:30
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Fre, 2020-05-08 10:00 - 11:30
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Fre, 2020-05-15 10:00 - 11:30
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Fre, 2020-05-22 10:00 - 11:30
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Fre, 2020-05-29 10:00 - 11:30
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Fre, 2020-06-05 10:00 - 11:30
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Fre, 2020-06-12 10:00 - 11:30
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Fre, 2020-06-19 10:00 - 11:30
Datum: 
Fre, 2020-06-26 10:00 - 11:30
Datum: 
Fre, 2020-07-03 10:00 - 11:30
Datum: 
Fre, 2020-07-10 10:00 - 11:30
Datum: 
Fre, 2020-07-17 10:00 - 11:30

We will start an online reading group on DT invariants, stability conditions and geometry, to take place on
Fridays 10-11.30am. The first talk is background and will take place on Friday 10 (this week).

ONLINE: Special cycles on orthogonal Shimura varieties

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Speaker: 
Eugenia Rosu
Zugehörigkeit: 
MPIM
Datum: 
Die, 2020-07-21 14:00 - 15:00

Extending on the work of Kudla-Millson and Yuan-Zhang-Zhang, together with Yott we are constructing special cycles for a specific orthogonal Shimura variety. We further construct a generating series that has as coefficients the cohomology classes corresponding to the special cycle classes on the orthogonal Shimura variety and show the modularity of the generating series in the cohomology group over the complex numbers.

 

ONLINE: A glimpse on 3d modularity

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Speaker: 
Francesca Ferrari
Zugehörigkeit: 
SISSA
Datum: 
Die, 2020-07-28 14:00 - 15:00

https://bbb.mpim-bonn.mpg.de/b/gae-a7y-hhd

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