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The MPIM Weekly Program

Alternatively, look at the MPI calendar or the Bonn Mathematics Calendar, a complete list of all mathematical events in Bonn.

Mon, 30 Jun 2025

09:00 - 15:00
MPIM Lecture Hall
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"

Mon, 07 Jul 2025

13:00 - 14:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
Registration
14:00 - 15:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Jackson van Dyke (TU Munich)
Moduli spaces of projective 3d TQFTs
14:00 - 16:00
ARGOS (Arithmetische Geometrie Oberseminar)
Center for Mathematics Bonn
Juan Esteban Rodriguez Camargo (MPIM)
A sketch of the proof of modularity of abelian surfaces
15:00 - 15:30
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Tea Room
Tea break
15:30 - 16:30
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Lukasz Fidkowski (University of Washington)
Non-invertible bosonic chiral symmetry on the lattice
16:30 - 16:45
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Tea Room
Tea break
16:45 - 17:45
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Matthias Ludewig (University of Greifswald)
Generalized Kitaev Pairings and Higher Berry curvature in coarse geometry
17:45 - 18:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Tea Room
Tea break
18:00 - 19:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Theo Johnson-Freyd (Perimeter Institute)
Some thoughts about Kapustin’s cobordism conjecture

Tue, 08 Jul 2025

14:00 - 15:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
David Reutter (University of Hamburg)
On the categorical spectrum of topological quantum field theories
15:00 - 15:30
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Tea Room
Tea break
15:30 - 16:30
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Agnes Beaudry (UC Boulder)
An algebraic theory of planon-only fracton orders
16:30 - 16:45
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Tea Room
Tea break
16:45 - 17:45
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
João Faria Martins (University of Leeds)
A categorification of Quinn's finite total homotopy TQFT with application to TQFTs and once-extended TQFTs derived from discrete higher gauge theory
17:45 - 18:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Tea Room
Tea break
18:00 - 19:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Emil Prodan (Yeshiva University)
Mapping the landscape of frustration-free models
19:00 - 20:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Tea Room
Finger food reception

Wed, 09 Jul 2025

14:00 - 15:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Alexander Schenkel (University of Nottingham)
C*-categorical prefactorization algebras for superselection sectors and topological order
15:00 - 15:30
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Tea Room
Tea break
15:30 - 16:30
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Constantin Teleman (UC Berkeley)
Quantizing homotopy types
16:30 - 16:45
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Tea Room
Tea break
16:45 - 17:45
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Nils Carqueville (University of Vienna)
Gauging categorical symmetries
17:45 - 18:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Tea Room
Tea break
18:00 - 19:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Nikita Sopenko (IAS)
Reflection positivity and invertible phases of 2d quantum many-body systems

Thu, 10 Jul 2025

10:30 - 12:00
Seminar Algebraic Geometry (SAG)
MPIM Lecture Hall
Luigi Martinelli (Bielefeld)
(Seminar SAG) On the exceptional locus of O’Grady’s nonsymplectic resolutions
14:00 - 15:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Ilka Brunner (LMU Munich)
Defects as functors between phases of Abelian gauged linear sigma models
15:00 - 15:30
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Tea Room
Tea break
15:30 - 16:30
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
David Penneys (Ohio State)
Holography for bulk-boundary local topological order
16:45 - 17:45
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Christoph Schweigert (University of Hamburg)
Tensor network states: a topological field theory perspective
17:45 - 18:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Tea break
18:00 - 19:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Greg Moore (Rutgers)
tba

Fri, 11 Jul 2025

09:00 - 10:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Speed talks (only MPIM, not streamed)
10:00 - 10:30
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Tea Room
Tea break
10:15 - 11:45
IMPRS seminar on various topics: Quantum knot invariants
MPIM Seminar Room
Lukas Bonfert (MPIM/Universität Bonn)
Quantum groups and recovering Jones and HOMFLY
10:30 - 11:30
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Speed talks (only MPIM, not streamed)
11:30 - 14:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
Break
12:00 - 13:30
Vorlesung Selected Topics in Algebraic Geometry: Habiro Cohomology
MPIM Seminar Room
Peter Scholze (MPIM)
Habiro Cohomology
14:00 - 15:00
Twinned workshop on "Quantum Field Theory and Topological Phases via Homotopy Theory and Operator Algebras"
MPIM Lecture Hall
Markus Pflaum (UC Boulder)
A tour d’horizon through homotopical aspects of C*-algebraic quantum spin systems
14:05 - 16:00
Oberseminar Arithmetic Geometry and Representation Theory
MPIM Seminar Room
Lucas Mann (Universität Münster)
Hyperbolic Localization and Second Adjointness

Tue, 15 Jul 2025

11:00 - 12:00
Low-dimensional topology seminar
MPIM Lecture Hall
Ivan Yakovlev (MPIM)
Metric ribbon graphs
16:30 - 17:30
PLeaSANT (Participative Learning Seminar on Any Number Theory)
MPIM Lecture Hall
Markus Hagen (NTNU)
Sharp mixed moment bounds for zeta times a Dirichlet L-function

Wed, 16 Jul 2025

10:30 - 12:00
Higher Differential Geometry Seminar
MPIM Lecture Hall
Hao Xu (Göttingen)
Condensable Topological Defects in 4D Dijkgraaf-Witten models—Classification of Fusion 2-Categorical Symmetries
14:30 - 15:30
Number theory lunch seminar
MPIM Lecture Hall
Marios Voskou (MPIM)
tba

Thu, 17 Jul 2025

15:00 - 16:00
MPI-Oberseminar
MPIM Lecture Hall
Dan Wang (MPIM)
Degeneration of Kähler polarisations associated to imaginary-time flow

Fri, 18 Jul 2025

10:15 - 11:45
IMPRS seminar on various topics: Quantum knot invariants
MPIM Lecture Hall
Samuel Lee (MPIM/Universität Bonn)
Quantum Knot Invariants via Perturbative Chern Simons Theory

To view the abstracts please click on the titles.

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