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Talk

Talks and seminars, possibly part of a conference or series.

Construction of some arithmetically defined compact locally symmetric spaces

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Speaker: 
Tyakal Venkataramana
Zugehörigkeit: 
Tata Institute/MPIM
Datum: 
Fre, 2019-12-13 10:15 - 12:00
Location: 
MPIM Lecture Hall

Talk coaching for Postdocs

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Speaker: 
Matthias Kreck
Zugehörigkeit: 
University of Bonn
Datum: 
Don, 2019-12-12 16:30 - 17:30
Location: 
MPIM Seminar Room
Parent event: 
Talk coaching for Postdocs

New guests at the MPIM

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Speaker: 
Adam Morgan, Zhiwei Zheng, Reinier Kramer
Datum: 
Don, 2019-12-12 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
MPI-Oberseminar

Some applications of complex Floer theory to topology

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Speaker: 
Laurent Cote
Zugehörigkeit: 
Stanford University
Datum: 
Die, 2019-12-17 14:00 - 15:00
Location: 
MPIM Lecture Hall

I will describe an approach to defining diffeomorphism invariants of low-dimensional manifolds and knots. Morally, these invariants are based on counting solutions to certain equations coming from quantum field theory. However, their rigorous construction relies on ideas from (complex)
symplectic topology and algebraic geometry. Parts of this talk are based on joint work with Ciprian Manolescu and with Ikshu Neithalath, as well as work in progress.

Period maps, I

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Speaker: 
Thorsten Beckmann
Zugehörigkeit: 
MPIM
Datum: 
Mit, 2019-12-11 16:15 - 17:45
Location: 
MPIM Seminar Room

IMPRS seminar on various topics: Period domains

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Organiser(s): 
C. Kaiser
Datum: 
Mit, 2019-12-11 13:30 - 15:00
Datum: 
Mit, 2019-12-18 13:30 - 15:00
Datum: 
Mit, 2019-12-25 13:30 - 15:00
Datum: 
Mit, 2020-01-01 13:30 - 15:00
Datum: 
Mit, 2020-01-08 13:30 - 15:00
Datum: 
Mit, 2020-01-15 13:30 - 15:00
Datum: 
Mit, 2020-01-22 13:30 - 15:00
Datum: 
Mit, 2020-01-29 13:30 - 15:00
Location: 
MPIM Seminar Room

Lens spaces, group actions, and surgery, II

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Speaker: 
Grigori Avramidi
Zugehörigkeit: 
MPIM
Datum: 
Fre, 2019-12-13 13:30 - 15:00
Location: 
MPIM Lecture Hall
Parent event: 
IMPRS Minicourse

Lens spaces, group actions, and surgery, III

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Speaker: 
Grigori Avramidi
Zugehörigkeit: 
MPIM
Datum: 
Mon, 2019-12-16 13:30 - 15:00
Location: 
MPIM Lecture Hall
Parent event: 
IMPRS Minicourse

Lens spaces, group actions, and surgery, I

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Speaker: 
Grigori Avramidi
Zugehörigkeit: 
MPIM
Datum: 
Mon, 2019-12-09 13:30 - 15:00
Location: 
MPIM Lecture Hall
Parent event: 
IMPRS Minicourse

Bökstedt periodicity and quotients of DVRs, II

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Speaker: 
Achim Krause
Zugehörigkeit: 
Universität Münster
Datum: 
Mon, 2019-12-09 16:30 - 18:30
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Bökstedt periodicity refers to Bökstedt's seminal description of topological Hochschild homology of finite fields. I will discuss a recent project with T. Nikolaus on computations of THH based on a relative version of Bökstedt periodicity. Our main applications are quotients of discrete valuation rings, generalizing Brun’s results for Z/p^n.

Bökstedt periodicity and quotients of DVRs, I

Posted in
Speaker: 
Achim Krause
Zugehörigkeit: 
Universität Münster
Datum: 
Mon, 2019-12-09 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Bökstedt periodicity refers to Bökstedt's seminal description of topological Hochschild homology of finite fields. I will discuss a recent project with T. Nikolaus on computations of THH based on a relative version of Bökstedt periodicity. Our main applications are quotients of discrete valuation rings, generalizing Brun’s results for Z/p^n.

Berkovich approach to degenerations of hyper-Kähler varieties

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Speaker: 
Enrica Mazzon
Zugehörigkeit: 
MPIM
Datum: 
Don, 2019-12-12 10:30 - 11:30
Location: 
MPIM Lecture Hall
To a degeneration of varieties, we can associate the dual intersection complex, a topological space that encodes the combinatoric of the central fiber and reflects the geometry of the generic fiber.
In this talk I will show how the techniques of Berkovich geometry give an insight into the study of the dual complexes. In this way, we are able to determine the homeomorphism type of the dual complex of some degenerations of hyper-Kähler varieties.

The results are in accordance with the predictions of mirror symmetry, and the recent work about the rational homology of dual complexes of degenerations of hyper-Kähler varieties, due to Kollár, Laza, Saccà and Voisin. This is joint work with Morgan Brown.

 

Geometric construction of homology classes in Riemannian manifolds covered by products of hyperbolic planes

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Speaker: 
Pascal Zschumme
Zugehörigkeit: 
KIT, Karlsruhe
Datum: 
Die, 2019-12-10 10:15 - 12:00
Location: 
MPIM Lecture Hall

We study the homology of Riemannian manifolds of finite volume that are covered by a product of r copies  of the hyperbolic plane. Using a variation of a method developed by Avramidi and Nyguen-Phan, we show that any such manifold  M possesses, up to finite coverings, an arbitrarily large number of compact oriented flat totally geodesic r-dimensional submanifolds whose fundamental classes are linearly independent in the r-th homology group of M.

The maximum of the Riemann zeta function on the 1-line

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Speaker: 
Winston Heap
Zugehörigkeit: 
London Metropolitan University/MPIM
Datum: 
Mit, 2019-12-11 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

We consider upper bounds of the Riemann zeta function on the 1-line and demonstrate a link with the maximum of the function S(t) - the remainder in the formula for the number of non-trivial zeros of height t in the critical strip. In particular, we show that a conjecture of Littlewood on the maximum of \zeta(1+it) follows from a folklore conjecture on the max of S(t).

tba

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Speaker: 
Beibei Liu
Zugehörigkeit: 
University of California, Davis/MPIM
Datum: 
Don, 2019-12-19 13:30 - 14:30
Location: 
MPIM Lecture Hall

Talk coaching for Postdocs

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Speaker: 
Matthias Kreck
Zugehörigkeit: 
University of Bonn
Datum: 
Don, 2019-12-05 16:30 - 17:30
Location: 
MPIM Seminar Room
Parent event: 
Talk coaching for Postdocs

tba

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Speaker: 
Jonas Beyrer
Zugehörigkeit: 
Universität Heidelberg
Datum: 
Don, 2020-01-30 16:30 - 17:30
Location: 
MPIM Lecture Hall

tba

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Speaker: 
Sebastian Hensel
Zugehörigkeit: 
LMU München
Datum: 
Don, 2020-01-23 16:30 - 17:30
Location: 
MPIM Lecture Hall

Homotopy Algebras III: Examples and Applications

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Speaker: 
Lory Aintablian-Kadiyan
Zugehörigkeit: 
MPIM
Datum: 
Mit, 2019-12-04 16:15 - 17:45
Location: 
MPIM Lecture Hall

tba

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Speaker: 
Niels Martin Møller
Zugehörigkeit: 
Universität Kopenhagen
Datum: 
Don, 2020-01-16 13:30 - 14:30
Location: 
MPIM Lecture Hall
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