AG-Seminar WS2021/22:

2026-09-01T14:08:31Z

Lis45184:

'''AG Seminar'''

'''Description:''' The aim of the Seminar is to present and discuss recent results in research areas from Homotopy Theory and K-theory to Global Analysis.

'''Time and place:''' Thursday 12-14, SFB Lecture Hall.

'''Zoom Link:''' https://uni-regensburg.zoom.us/j/7601042838?pwd=bUVEaHhuY01abmo4T3Fza1NZMEVNUT09

'''Wintersemester 2026/27'''

'''Schedule'''

{|border="1"
!No
!Date
!Title / Abstract
!Speaker
|-
|1
|15.10.2026
|
|
|-
|2
|22.10.2026
|
|
|-
|3
|29.10.2026
|
| Fabio Neugebauer (Bonn)
|-
|4
|5.11.2026
|
|David Reutter (Hamburg)
|-
|5
|12.11.2026
|
|
|-
|6
|19.11.2026
|
|
|-
|7
|26.11.2026
| tba
| Shay Ben-Moshe (MPIM)
|-
|8
|
|
|
|-
|9
|
|
|
|-
|10
|
|
|
|-
|11
|
|
|
|-
|12
|
|
|
|-
|13
|
|
|
|-
|14
|
|
|
|-
|15
|
|
|
|-
|16
|
|
|
|}

<hr><hr>

'''Sommersemester 2026'''

'''Schedule'''

{|border="1"
!No
!Date
!Title / Abstract
!Speaker
|-
|1
|16.4.2026
| [[Complexes of stable ∞-categories and higher Segal conditions]]
| Fernando Abellan (Bonn)
|-
|2
|23.4.2026
| [[Presenting the stratified homotopy hypothesis]]
| Lukas Waas (Oxford University)
|-
|3
|30.4.2026
| [[Calabi—Yau structures on constructible sheaves categories]]
| Enrico Lampetti (IMJ-PRG, Paris)
|-
|4
|7.5.2026
| [[Monadic resolutions for (generalized) spaces]]
| Klaus Mattis (Mainz)
|-
|5
|14.5.2026
| Holiday
|
|-
|6
|21.5.2026
|6 functors and C^*-algebras
|U. Bunke
|-
|7
|28.5.2026
|Scissors congruence K-theory of manifolds
|G. Raptis
|-
|8
|4.6.2026
| Holiday
|
|-
|9
|11.6.2026
| [[The span-squares adjunction]]
| Wolfgang Steimle (Augsburg)
|-
|10
|18.6.2026
| Motivic Methods in Geometric Representation Theory
| Jens Eberhardt (Mainz)
|-
|11
|25.6.2026
| [[On the geometrization of synthetic spectra]]
| Marius Nielsen (NTNU Trondheim)
|-
|12
|2.7.2026
|
|
|-
|13
|9.7.2026
| [[The Cubes Functor of (∞,n)-Categories]]
| Leor Neuhauser (Hebrew University of Jerusalem)
|-
|14
|16.7.2026
| [[Purity of Motivic Cohomology in Mixed Characteristic]]
| Arnab Kundu (IMAR, Bucharest)
|}

<hr><hr>

'''Wintersemester 2025/26'''

'''Schedule'''

{|border="1"
!No
!Date
!Title / Abstract
!Speaker
|-
|1
|16.10.2025
|
|
|-
|2
|23.10.2025
| DGAs with polynomial homology and applications
| Markus Land
|-
|3
|30.10.2025
|
|
|-
|4
|6.11.2025
| [[Duality for K-theory in motivic homotopy theory]]
| Jeroen Hekking
|-
|5
|13.11.2025
| '''talk Cancelled'''
|
|-
|6
|20.11.2025
| [[On Verdier Duality]]
| Georg Lehner (Universität Münster)
|-
|7
|27.11.2025
| [[Nori motivic sheaves as sheaves of Nori motives]]
| Luca Terenzi
|-
|8
|4.12.2025
| [[The cobordism spectrum of Poincare spaces]]
| Kaif Hilman
|-
|9
|11.12.2025
| What is an ∞-Category?
| Nima Rasekh (Universität Greifswald)
|-
|10
|18.12.2025
| [[Grothendieck-Witt theory of pushouts]]
| Andreas Huber (Universität Augsburg)
|-
|11
|8.1.2026
|
|
|-
|12
|15.1.2026
| [[Semifree isovariant Poincaré spaces and the gap condition]]
| Dominik Kirstein (LMU München)
|-
|13
|22.1.2026
| [[A generalisation of Day convolution for operad-like structures]]
| Thomas Blom (MPIM Bonn)
|-
|14
|29.1.2026
| [[K-theoretic Poitou-Tate duality & the heart of D^b of locally compact abelian groups]]
| Oliver Bräunling (FH Dortmund)
|-
|15
|5.2.2026
| [[Fibrations in directed type theory]]
| Benno Lossin (TUM)
|}

<hr><hr>

'''Sommersemester 2025'''

'''Schedule'''

{|border="1"
!No
!Date
!Title / Abstract
!Speaker
|-
|1
|24.4.2025
|Manifolds and analytic stacks
|J. Mann (Bonn)
|-
|2
|1.5.2025
|Holiday
|
|-
|3
|8.5.2025
| Effectivity of generalized double categories
| Félix Loubaton
|-
|4
|15.5.2025
|The tt-Spectrum of Integral Permutation Modules
| Juan Omar Gomez (Bielefeld)
|-
|5
|22.5.2025
|Constructible sheaves on toric varieties
|Remy van Dobben de Bruyn
|-
|6
|29.5.2025
|Holiday
|
|-
|7
|5.6.2025
|
|
|-
|8
|12.6.2025
| The real Betti realization of motivic Thom spectra and of very effective Hermitian K-theory
| Julie Bannwart
|-
|9
|19.6.2025
| Holiday
|
|-
|10
|26.6.2025
| [[The root functor]]
| Francesca Pratali
|-
|11
|3.7.2025
| Some remarks on exact categories and their K-theory
| Christoph Winges
|-
|12
|10.7.2025
| [[Unfolding of symmetric monoidal (∞,n)-categories]]
| Rune Haugseng
|-
|13
|17.7.2025
| On the categorification of homology
| Hadrian Heine
|-
|14
|24.7.2025
| tba
| Can Yaylali
|}

<hr><hr>

'''Wintersemester 24/25'''

'''Schedule'''

{|border="1"
!No
!Date
!Title / Abstract
!Speaker
|-
|1
|17.10.2024
|[[(∞,2)-Topoi and descent]]
|Fernando Abellan Garcia (NTNU)
|-
|2
|24.10.2024
|
|
|-
|3
|31.10.2024
|The geometric diagonal of the special linear algebraic cobordism
|Egor Zolotarev (LMU)
|-
|4
|07.11.2024
|[[Purity for Algebraic Stacks]]
|Alessandro D'Angelo (KTH)
|-
|5
|14.11.2024
|
|
|-
|6
|21.11.2024
|Equivariant aspects of Hochschild homology
|Zhouhang Mao (Univ. Amsterdam)
|-
|7
|28.11.2024
|[[Proof of the Deligne-Milnor conjecture]]
|Massimo Pippi (Univ. Angers)
|-
|8
|05.12.2024
|[[Classification of n-connective (2n-2)-truncated spaces]]
|Daniel Exposito (Univ. Copenhagen)
|-
|9
|12.12.2024
|[[K-theory for analytic spaces]]
|Devarshi Mukherjee
|-
|10
|19.12.2024
|
|
|-
|11
|09.01.2025
|Grothendieck-Witt theory of derived schemes
|Marc Hoyois
|-
|12
|16.01.2025
|
|
|-
|13
|23.01.2025
|Model-Independent Lax Functors
|Johannes Gloßner
|-
|14
|30.01.2025
|[[Higher enhancements of mixed Hodge modules]]
|Swann Tubach (ENS Lyon)
|-
|15
|06.02.2025
|[[Limits of (∞, 1)-categories with Structure & Their Lax Morphisms]]
|Joanna Ko (Masaryk University)
|}

<hr><hr>

'''SOMMER Semester 2024'''

'''Schedule'''

{|border="1"
!No
!Date
!Title / Abstract
!Speaker
|-
|1
|18.4.2024
|
|
|-
|2
|25.04.2024
| A Functorial Rectification of Finitely Cocomplete ∞-Categories
| Benni Ngo
|-
|3
|02.05.2024
| Perverse sheaves and weak Lefschetz theorems
| Denis-Charles Cisinski
|-
|4
|09.05.2024
| No Seminar (Christi Himmelfahrt)
|
|-
|5
|16.05.2024
| this week, the whole seminar moves to Greifswald
|
|-
|6
|23.05.2024
| Grothendieck construction and representation theorem for lax double presheaves
| Benedikt Fröhlich
|-
|7
|30.05.2024
| No seminar (Corpus Christi)
|
|-
|8
|06.06.2024
|[[Étale motives of geometric origin]]
| Raphaël Ruimy (Milan)
|-
|9
|13.06.2024
|[[A general Greenlees-Mays splitting principle]]
|Ivo Dell'Ambrogio (Lille)
|-
|10
|20.06.2024
|[[Categorical Künneth formulas]]
|Timo Richarz (TU Darmstadt)
|-
|11
|27.06.2024
|Conference
|
|-
|12
|04.07.2024
|[[The tempered dual of reductive symmetric spaces, C*-algebras, and K-theory]]
|Shintaro Nishikawa (Southampton)
|-
|13
|11.07.2024
|N.N
|Pelle Steffens (Munich)
|-
|14
|18.07.2024
| [[Animated λ-rings and Frobenius lifts]]
| Edith Hübner (Münster)
|-
|}

<hr><hr>

'''Winter Semester 2023/24'''

'''Schedule'''

{|border="1"
!No
!Date
!Title / Abstract
!Speaker
|-
|1
|19.10.2023
|[[On the motivic Adams conjecture]]
|Alexey Ananyevskiy
|-
|2
|26.10.2023
|[[Dualizable categories and E-Theory]]
|Benjamin Dünzinger/Ulrich Bunke
|-
|3
|02.11.2023
|[[Dualizable categories and E-Theory-II]]
|Benjamin Dünzinger/Ulrich Bunke
|-
|4
|09.11.2023
|[[A pro-cdh topology and motivic cohomology of schemes]]
|Shuji Saito
|-
|5
|16.11.2023
|Cohomological invariants of quadrics via Morava motives
|Pavel Sechin
|-
|6
|23.11.2023
|Formal category theory within ∞-categorical proarrow equipments
|Jaco Ruit
|-
|7
|30.11.2023
|
|
|-
|8
|07.12.2023
|[[Motivic cohomology of mixed characteristic schemes]]
|Tess Bouis
|-
|9
|14.12.2023
|[[Six-functor formalisms are compactly supported]]
|Josefien Kuijper
|-
|10
|21.12.2023
|Towards a pro-étale homotopy type of schemes
| Sebastian wolf
|-
|11
|11.01.2024
|
|
|-
|12
|18.01.2024
|Gabber's presentation lemma over a general base
|Suraj Yadav
|-
|13
|25.01.2024
|[[Chow-Lefschetz motives]]
|Bruno Kahn
|-
|14
|01.02.2024
|[[Topological Modular Forms and supersymmetric quantum field theories]]
|Mayuko Yamashita
|-
|15
|08.02.2024
|[[Group completion of E_n-spaces and infinite products]]
|Georg Lehner (FU Berlin)
|-
|}

<hr><hr>

'''Summer Semester 2023'''

'''Schedule'''

{|border="1"
!No
!Date
!Title / Abstract
!Speaker
|-
|1
|20.04.2023
|
|
|-
|2
|27.04.2023 '''12:30'''
|Universality and Examples in the Context of Functorial Semi-Norms (PhD defense)
|Johannes Witzig
|-
|3
|04.05.2023
|No seminar
|
|-
|4
|11.05.2023
|tba
|Hoang Kim Nguyen
|-
|5
|18.05.2023
|No seminar (holiday)
|
|-
|6
|25.05.2023
|[[Separability in homotopical algebra]]
|Maxime Ramzi (Copenhagen)
|-
|7
|01.06.2023
|[[Blow-ups and normal bundles in nonconnective derived geometry]]
|Jeroen Hekking
|-
|8
|08.06.2023
|No seminar (holiday)
|
|-
|9
|15.06.2023
|The theorem of the heart
|Giacomo Bertizzolo
|-
|10
|22.06.2023
|[[Shapes and locally constant sheaves]]
| Marc Hoyois
|-
|11
|29.06.2023
|Norms and Transfers in Motivic Homotopy Theory
|Brian Shin
|-
|12
|06.07.2023
|[[On the category of localizing motives]]
|Alexander Efimov
|-
|13
|13.07.2023
|Twisted ambidexterity in equivariant homotopy theory
|Bastiaan Cnossen
|-
|14
|20.07.2023
| (reserved)
|
|-
|}

<hr> <hr>

'''Winter Semester 22/23'''

'''Schedule'''

{|border="1"
!No
!Date
!Title / Abstract
!Speaker
|-
|1
|20.10.2022
|Model categories for o-minimal geometry
|Reid Barton (Univ. Freiburg)
|-
|2
|27.10.2022
|
|
|-
|3
|03.11.2022 '''[online]'''
|The reductive Borel-Serre compactification as a model for unstable algebraic K-theory
|Mikala Ørsnes Jansen (Copenhagen)
|-
| 4
|10.11.2022
| [[Traces and categorification]]
| Bastiaan Cnossen (Bonn)
|-
|5
|17.11.2022
|no seminar
|
|-
|6
|24.11.2022
| [[Cut and paste invariants of manifolds via K-theory]]
| Julia Semikina (Münster)
|-
|7
|01.12.2022
|Discussion on Duality and Transfer I: Becker-Gottlieb transfer, Atiyah-Duality and A-theory transfer
|Bunke/Winges/Raptis
|-
|8
|08.12.2022
|Discussion on Duality and Transfer II: Fibrewise duality and transfer, functoriality
|N.N
|-
|9
|15.12.2022
|[[Unipotent homotopy theory of schemes]]
|Shubhodip Mondal (MPIM Bonn)
|-
|10
|22.12.2023
|[[The stable cohomology of symplectic groups of the integers]]
|Fabian Hebestreit (Aberdeen)
|-
|11
|12.01.2023
|[[The logic of étale maps]]
|Mathieu Anel (Carnegie Mellon University)
|-
|12
|19.01.2023
|[[Decoupling Moduli of Configurations Spaces on Surfaces]]
|Luciana Basualdo Bonatto (MPIM Bonn)
|-
|13
|26.01.2023
|The K_2-analogue of Bass-Quillen conjecture and A1-fundamental groups of Chevalley groups.
|Sergey Sinchuk (Munich, JetBrains GmbH)
|-
|14
|02.02.2023
|Genuine equivariant hermitian K-theory for finite groups
|Kaif Hilman (MPIM Bonn)
|-
|15
|09.02.2023
| Proper morphisms of infinity topoi
| Louis Martini (NTNU Trondheim)
|}

<hr><hr>

'''Summer Semester 2022'''

'''Schedule'''

{|border="1"
!No
!Date
!Title / Abstract
!Speaker
|-
|1
|28.04.2022
| Devissage in algebraic K-theory (0)
| George Raptis
|-
|2
|05.05.2022
| Devissage in algebraic K-theory (1)
| Marco Volpe
|-
|3
|12.05.2022
|
|
|-
| 4
| 19.05.2022 '''[online]'''
| [[Universal cohomology theories]]
| Luca Barbieri Viale (Milan)
|-
|5
|26.05.2022
| Christi-Himmelfahrt
| -
|-
|6
| 02.06.2022
| [[Cdh motivic cohomology via prisms]]
| E. Elmanto (Harvard)
|-
|7
| 09.06.2022 '''[online]'''
| [[Exponential periods and o-minimality]]
| Johan Commelin (Freiburg)
|-
|8
| 16.06.2022
| Fronleichnam
| -
|-
|9
| 23.06.2022
| [[Excisive Approximation of l^1-Homology]]
| J. Witzig (Regensburg)
|-
|10
| 30.06.2022
|
|
|-
|11
| 07.07.2022
| Posets for which Verdier duality holds
| Ko Aoki (MPIM Bonn)
|-
|12
| 14.07.2022
| [[Synthetic (∞,1)-category theory in simplicial homotopy type theory]]
| Jonathan Weinberger (Johns Hopkins University)
|-
|13
| 21.07.2022
| Artin motivic tensor-triangular geometry
| Martin Gallauer (MPIM Bonn)
|-
|14
| 28.07.2022
| X. Bavarian Geometry & Topology Meeting
| (Augsburg)
|}

<hr><hr>

'''Winter Semester 2021/22'''

'''Schedule'''

{|border="1"
!No
!Date
!Title / Abstract
!Speaker
|-
|1
|21.10.2021
| Derived microlocal sheaf theory
| Adeel Khan (Academia Sinica)
|-
|2
|28.10.2021
|
|
|-
|3
|4.11.2021
| Bounded cohomology and homotopy colimits
| George Raptis
|-
| 4
| 11.11.2021
| [[Filter Quotient ∞-Categories]]
| Nima Rasekh (EPFL)
|-
|5
|18.11.2021
| *****
| SFB Meeting in Windberg
|-
|6
| 25.11.2021
| [[Quadratic enrichments of enumerative counts using Atiyah-Bott localization]]
| Sabrina Pauli (Duisburg-Essen)
|-
|7
| 2.12.2021
| [[The Chow t-structure on the ∞-category of motivic spectra]]
| Tom Bachmann (LMU)
|-
|8
| 9.12.2021
| G-global homotopy theory and algebraic K-theory
| Tobias Lenz (Bonn)
|-
|9
| 16.12.2021
| *****
| [http://frenck.net/Math/BGTM/ 9th Bavarian Geometry & Topology Meeting]
|-
|10
| 13.1.2022
| [[cancelled]]
|
|-
|11
| 20.1.2022
| [[Topological Fukaya categories of symmetric powers]]
| Tobias Dyckerhoff (Hamburg)
|-
|12
| 27.1.2022
| [[Unstraightening for Segal spaces]]
| Joost Nuiten (Toulouse)
|-
|13
| 3.2.2022
| [[Polynomial monads, Grothendieck homotopy theory and delooping of spaces of long knots]]
| Michael Batanin (Prague)
|-
|14
| 10.2.2022
| [[Homotopy links and stratified homotopy theories]]
| Sylvain Douteau (Stockholm)
|}

SFB1085 - Higher Invariants - User contributions [en]

AG-Seminar WS2021/22: