NEXT SEMINAR

Seminar 49 + 50

30 September 2025 @ Restaurant Le Mess
( Louis Schmidtlaan 1, 1040 Etterbeek )


The whole event takes place in restaurant Le Mess. Lunch will be offered to participants that register before September 15. This can be done simply by sending an email to joost.vercruysse@ulb.be.


Speakers:

  • 10:00-11:00: Kevin Coulembier (University of Sydney)
    • Quantum groups and tensor ideals of abelian type

  • 11:00-11:30: coffee break

  • 11:30-12:30: Robert Laugwitz (University of Nottingham)
    • Frobenius monoidal functors and extensions of Hopf algebras

  • 12:30-14:00: lunch in Le Mess

  • 14:00-15:00: Christoph Schweigert (Universität Hamburg)
    • GV-module categories, Frobenius algebras and relative Serre functors

  • 15:00-15:30: coffee break

  • 15:30-16:30: Ehud Meir (University of Aberdeen)
    • TBA



    HISTORY

    2025

    Seminar 48

    21 March 2025 @ UCLouvain
    (room B203-05, building Marc de Hemptinne (cyclotron), tower B, 2nd floor)

    Speakers:

  • 14:00-15:00: Jules Martel (Univ. Paris-Cergy)
    • Quantum groups in nature

  • 15:15-16:15: Ruslan Maksimau (Univ. Paris-Cergy)
    • Diagram Varieties and a Geometric Approach to Verma Module Categorification



    Seminar 47

    14 February 2025 @ ULB
    (Salle Solvay, 5th floor, Building NO, Campus Plaine)

    Speakers:

  • 14:00-15:00: Eliezer Batista (Universidade Federal de Santa Catarina)
    • Matryoshkas, Christmas trees and partial representations

  • 15:15-16:15: Davide Ferri (University of Turin and VUB)
    • Matched pairs and Yetter-Drinfeld braces



    2024

    Seminar 46

    27 November 2024 @ VUB
    (campus Etterbeek, Building G, 6th floor, room G6.60)

    Speakers:

  • 14:00-15:00: Joeri De Ro (VUB)
    • Morita theory for dynamical von Neumann algebras

  • 15:15-16:15: Mao Hoshino (University of Tokyo)
    • Deformed quantum enveloping algebra and its application to quantized semisimple coadjoint orbits



    Seminar 45

    22 May 2024 @ ULB
    (Salle Solvay, 5th floor, Building NO, Campus Plaine)

    Speakers:

  • 14:00-15:00: Leandro Vendramin (VUB)
    • Nichols Algebras over groups.

  • 15:15-16:15: Gert Vercleyen (Maynooth University)
    • On Low-Rank Multiplicity-Free Fusion Categories.



    Seminar 44

    24 April 2024 @ UCLouvain
    (room B203-05, building Marc de Hemptinne (cyclotron), tower B, 2nd floor)

    Speakers:

  • 14:00-15:00: Mateusz Stroinski (Uppsala University)
    • Tambara reconstruction

  • 15:15-16:15: Jonas Nehme (University of Bonn)
    • Khovanov arc algebras for the periplectic Lie superalgebras



    Seminar 43

    12 March 2024 @ VUB
    (campus Etterbeek, Building G, 6th floor, room G6.60)

    Speakers:

  • 15:00-16:00: Jacek Krajczok
    • Invariants of q-deformed compact Lie groups

  • 16:00-17:00: Davide Dal Martello
    • Quantum cluster varieties, quiver seizures, and GDAHA



    Seminar 42

    8 February 2024 @ ULB
    (Salle de Profs, 9th floor, building NO, Campus Plaine, ULB.)

    Speakers:

  • 14:00-14:50: Tomasz Brzezinski (University of Swansea)
    • Lie algebras on affine spaces

  • 15:00-15:50: Arne Van Antwerpen (UGent)
    • Quadratic algebras of left non-degenerate set-theoretic solutions of the Yang-Baxter equation



    2023

    Seminar 41

    18 December 2023 @ UCLouvain
    (Room B203-05, building Marc de Hemptinne (cyclotron), tower B, 2nd floor)

    Speakers:

  • 14:00-15:00: Severin Barmeier (University of Cologne)
    • A∞ deformations of extended Khovanov arc algebras

  • 15:15-16:15: Samuel Hannah (Cardiff University)
    • Classifying Frobenius Algebras in Dijkgraaf-Witten Categories



    Seminar 40

    8 November 2023 @ ULB
    ("Salle des profs", batiment NO, 9th floor, campus Plaine)
    Because of the train strike, the seminar will take place at ULB and not at UCL.

    Speakers:

  • 14:00-15:00: Rubén Martos Prieto (Université de Lille)
    • Equivariant Kasparov category and tt-geometry

  • 15:15-16:15: Edmund Heng (IHES Paris)
    • A generalised McKay correspondence for fusion categories



    Seminar 39

    10 October 2023 @ VUB
    (campus Etterbeek, Building G, 6th floor, room G6.60)

    Speaker:

  • 14:30-15:30: Lucas Hataishi (University of Oslo)
    • C*-algebraic factorization homology



    Seminar 38

    8 June 2023 @ ULB
    ("Salle des profs", batiment NO, 9th floor, campus Plaine)

    Speakers:

  • 14:00-15:00: Mykola Khrypchenko (Universidade Federal de Santa Catarina)
    • Regular Hom-Lie structures on incidence algebras

  • 15:15-16:15: Melvin Yeung (UHasselt)
    • Smooth morphisms and Cauchy-Kovalevskaya for Bialgebras



    Seminar 37

    27 April 2023 @ UCLouvain
    (Room E.349, building Marc de Hemptinne (cyclotron), tower E, 3rd floor)

    Speakers:

  • 14:00-15:00: Leonardo Maltoni (Paris)
    • Towards a Bernstein presentation of the affine Hecke category

  • 15:15-16:15: Alexis Langlois-Rémillard (Ghent)
    • Uncoiled affine et periodic Temperley-Lieb algebras and their Wenzl-Jones idempotents



    Seminar 36

    30 March 2023 @ VUB
    (campus Etterbeek, Building G, 6th floor, room G6.60)

    Speakers:

  • 14:00-15:00: Bob Yuncken
    • Crystallizing compact semisimple Lie groups

  • 15:15-16:15: Simon Schmidt
    • Solution group representations as quantum symmetries of graphs



    Seminar 35

    23 February 2023 @ ULB
    ("Salle des profs", batiment NO, 9th floor, campus Plaine)

    Speakers:

  • 14:00-15:00: David Jaklitsch (Hamburg)
    • Interaction of duals and pivotal structures with Morita theory

  • 15:15-16:15: Eliezer Batista (Florianopolis)
    • Quantum Inverse Semigroups



    2022

    Seminar 34

    23 November 2022 @ VUB
    (campus Etterbeek, Building G, 6th floor, room G6.60)

    Speakers:

  • 13:00-14:00: Lukas Rollier (KU Leuven)
    • Quantum automorphism groups of connected locally finite graphs

  • 14:15-15:15: Marco Mackaay (U. Algarve)
    • Finitary 2-representation theory

  • 15:30-16:30: Benjamin Anderson-Sackaney (Université de Caen)
    • Relative Amenability, Amenability, and Coamenability of Coideals



    Seminar 33

    19 October 2022 @ UCLouvain
    (Room B203-05, building Marc de Hemptinne (cyclotron), tower B, 2nd floor)

    Speakers:

  • 14:00-15:00: Jieru Zhu (UCLouvain)
    • Web deformations over superalgebras

  • 15:00-16:00: Geoffrey Janssens (UCLouvain)
    • Comparing additive and monoidal categorification via Quantum Affine Algebras



    Seminar 32

    30 June 2022 @ VUB
    (campus Etterbeek, Building G, 6th floor, room G6.324)

    Speakers:

  • 15:00-16:00: Bart Vlaar (Max Planck, Bonn)
    • The cylindrical nature of Drinfeld-Jimbo quantum groups and the origin of trigonometric K-matrices

  • 16:00-17:00: István Heckenberger (Philipps-Universität Marburg)
    • A meeting of Nichols algebras and color Lie bialgebras



    Seminar 31

    27 May 2022 @ ULB
    ("Salle des profs", batiment NO, 9th floor, campus Plaine)

    Speakers:

  • 14:00-15:00: Sugato Mukhopadhyay
    • Levi-Civita connections on bicovariant differential calculus

  • 15:00-16:00: Réamonn Ó Buachalla (Mathematical Institute of Charles University in Prague)
    • Quantum Root Vectors and a Dolbeault Double Complex for the A-Series Quantum Flag Manifolds

  • 16:00-17:00: Alessandro Carotenuto (Institute of Mathematics of the Czech Academy of Sciences in Prague)
    • Bimodule connections for line bundles over irreducible quantum flag manifolds



    Seminar 30

    2 May 2022 @ UCLouvain
    (Room B203-05, building Marc de Hemptinne (cyclotron), tower B, 2nd floor)

    Speakers:

  • 14:00-15:00: Léo Schelstraete (UCLouvain)
    • Odd Khovanov homology and 2-supercategories

  • 15:00-16:00: Piotr Soltan (University of Warsaw)
    • Quantum groups and factors



    Seminar 29

    28 March 2022 @ ULB
    (Salle Solvay, campus Plaine, building NO, 5th floor)

    Speakers:

  • 14:00-15:00: Jari Desmet (UGent)
    • Non-associative Frobenius algebras for simple algebraic groups

  • 15:00-16:00: Sira Gratz (University of Glasgow)
    • SL(k)-friezes from Cluster Algebras



    Seminar 28

    22 February 2022 @ UCL
    (Room B203-05, building Marc de Hemptinne (cyclotron), tower B, 2nd floor)

    Speakers:

  • 14:00-15:00: Joel Right Dzokou Talla (VUB)
    • Quantum SL(2,R) and its irreducible representations

  • 15:00-16:00: Louis-Hadrien Robert (Université de Luxembourg)
    • Categorification of 1 and of the Alexander polynomial



    2021

    Seminar 27

    12 November 2021 @ VUB
    (campus Etterbeek, Building G, 6th floor, room G6.324)

    Speakers:

  • 14:00-15:00: Leandro Vendramin (VUB)
    • Groups, rings and the Yang-Baxter equation

  • 15:00-16:00: Jacques Darné (UCLouvain)
    • Nilpotent quandles



    Seminar 26

    22 October 2021 @ ULB
    ("Salle des profs", batiment NO, 9th floor, campus Plaine)

    Speakers:

  • 14:00-15:00: Alfons Van Daele (KUL)
    • Finite quantum hypergroups

  • 15:00-16:00: Johannes Berger (ULB)
    • Modified traces and monadic cointegrals for quasi-Hopf algebras



    2020

    Seminar 25 - Canceled due to COVID-19 emergency
    (18 March 2020 @ ULB (Room TBA))

    Speakers:

  • 10:00-11:00: István Heckenberger
    • Lusztig's PBW bases from the perspective of braided Hopf algebras

  • 11:00-12:00: Simon Lentner
    • New Borel subalgebras of quantum groups



    Seminar 24 (19 February 2020 @ UCL (Room B203-05, building Marc de Hemptinne (cyclotron), tower B, 2nd floor))

    Speakers:

  • 11:00-12:00: Laiachi El Kaoutit (Universidad de Granada)
    • Lie Algebroids, Groupoids and Hopf Algebroids: a brief introduction. (Presentation)

  • 12:00-13:00: Ruslan Maksimau (Université Montpellier)
    • Geometric construction of DG-enhanced versions of nil-Hecke algebras



    Seminar 23 (5 February 2020 @ VUB (Room 6G324))

    Speakers:

  • 14:00-15:00: Nicolas Crampé (Université Montpellier)
    • Schur-Weyl Duality and Racah Algebra

  • 15:00-16:00: Hadewijch De Clercq (UGent)
    • Defining Relations for Quantum Symmetric Pair Coideals of Kac-Moody Type



    2019

    Seminar 22 (6 December 2019 @ ULB (Salle Solvay, batiment NO, 5ième étage))

    Speakers:

  • 11:00-12:00: José Gómez-Torrecillas
    • An example of a biseparable ring extension which is not Frobenius

  • 12:00-13:00: Ehud Meir
    • Invariant theory, symmetric groups and Hopf algebras



    Seminar 21 (26 November 2019 @ UCL (Room B203-05, building Marc de Hemptinne (cyclotron), tower B, 2nd floor))

    Speakers:

  • 14:00-15:00: Stephen Moore
    • The Representation Theory of the finite and infinite Temperley-Lieb algebras



    Seminar 20 (17 October 2019 @ UCL (Room B203-05, building Marc de Hemptinne (cyclotron), tower B, 2nd floor))

    Speakers:

  • 10:45-11:35: Juliet Cooke (UCLouvain)
    • Skein Categories

  • 11:55-12:45: Abel Lacabanne (UCLouvain)
    • Categorification of Z-modular data associated with complex reflection groups



    Seminar 19 (19 June 2019 @ ULB (Room OF2072))

    Speakers:

  • 13:30-14:20: Tom De Medts (UGent):
    • Decomposition algebras and representation theory

  • 14:35-15:25: Ruben Henrard (UHasselt)
    • Localizations of one-sided exact categories

  • 15:40-16:30: Adam-Christiaan Van Roosmalen (UHasselt)
    • Deriving one-sided exact categories



    Seminar 18 (8 May 2019 @ VUB (Room 6G324))

    Speakers:

  • 14:00-14:50: Haonan Zhang:
    • Idempotent states on Sekine quantum groups

  • 15:00-15:50: Mateusz Wasilewski:
    • Quantum isomorphisms of graphs and monoidal equivalence



    Seminar 17 (5 April 2019 @ ULB (Room OF2072))

    Speakers:

  • 11:00-11:50: Marco Matassa:
    • Kähler structures on quantum irreducible flag manifolds

  • 12:00-12:50: Andrey Krutov:
    • Schubert calculus for quantum irreducible flag manifolds



    Seminar 16 (29 March 2019 @ UCL Room: B203-05 (building Marc de Hemptinne (cyclotron), tower B, 2nd floor))

    Speakers:

  • 10:00-10:50: Daniel Tubbenhauer (University of Zurich)
    • A Tale of Dihedral groups SL(2), and beyond

  • 11:00-11:50: Paolo Saracco (ULB)
    • One-sided Hopf algebras and Frobenius pairs of functors for Hopf modules



    2018

    Seminar 15 (22 November 2018 @ ULB room P.2NO.707 (Building NO, 7th floor))

    Speakers:

  • 14:00-14:50: Loïc Foissy (Calais)
    • Chromatic and Ehrhart polynomial, Combinatorial Hopf algebras

  • 15:00-15:50: Alessandro Iraci (ULB)
    • The Delta Conjecture



    Seminar 14 (25 October 2018 @ VUB room D.1.07)

    Speakers:

  • Laura Maassen (RWTH Aachen University) (14:00-14:50)
    • The Intertwiner Space of Non-easy Group-theoretical Quantum Groups

  • Johan Konings (VUB) (15:00-15:50)
    • A Correspondence between Homogeneous and Galois Coactions of Hopf algebras



    Seminar 13 (6 and 7 September 2018)

    Speaker: Claudia Menini

  • 6 September 2018 @ ULB Salle de Profs (11:00)
    • Heavy Separable Functors.

  • 7 September 2018 @ VUB Room 6G324 (15:00)
    • Why Heavily Separable Functors? Comparing Monadic and adjoint decomposition.



    Seminar 12 (27 June 2018 @ ULB building N.O. "Salle Solvay")

    Speakers:

  • 14:00 - 14:55: Eliezer Batista
    • Partial group actions on monoidal categories.

  • 15:05 - 16:00: Bregje Pauwels
    • The tale site of the stable module category of a finite group



    Seminar 11 (28 February 2018 @ VUB (Room 6G324))

    Speakers:

  • 14:00 - 14:55: Frank Taipe
    • Algebraic Transformation Quantum Groupoids

  • 15:00 - 15:55: Réamonn Ò Buachalla
    • Schubert Calculus for Quantum Grassmannians



    2017

    Seminar 10 (5 December 2017 @ UCL (Room E.161))

    Speakers:

  • 14:30 - 15:20: Andrea Appel (Edinburgh)
    • Quantum groups, braid groups and monodromy

  • 15:30 - 16:20: Adrien Brochier (Hamburg)
    • Quantum character varieties



    Seminar 9 (9 November 2017 @ VUB (Room 6G324))

    Speakers:

  • 14:30 - 15:20: Marco Matassa
    • On PBW-deformations of braided exterior algebras

  • 15:30 - 16:20: Alexey Gordienko (VUB)
    • Equivalences of Hopf (co)module structures on algebras.



    Seminar 8 (12 October 2017 @ VUB (Room 6G324) and ULB (Room P.OF.2072))

    Speakers:

  • 11:00 - 12:00: Gabriella Böhm (Wigner Research Centre for Physics, Budapest) @ VUB
    • Hopf monads from lax functors

  • 14:00 - 15:00: Tomasz Brzezinski (Swansea University,UK) @ ULB
    • Betwixt and between, neither a brace nor a ring.

  • 15:15 - 16:15: Jürgen Fuchs (Karlstads Universitet, Karlstad) @ ULB
    • Correlators for non-semisimple conformal field theories.



    Seminar 7 (22 mai 2017 @ VUB (Room 6G324))

    Speakers:

  • 14:30 - 15:20: Matthias Valvekens (KU Leuven)
    • L2-Betti numbers for representation categories

  • 15:30 - 16:20: Matthias Floré (VUB)
    • A field of quantum upper triangular matrices



    Seminar 6 (24 april 2017 @ VUB (Room 6G324))

    Speakers:

  • 14:30 - 15:20: David Jordan (University of Edinburgh)
    • Dualizability and orientability for tensor and braided tensor categories

  • 15:30 - 16:20: Alexis Virelizier (Université Lille 1)
    • Generalized Kuperberg invariants of 3-manifolds



    Seminar 5 (20 march 2017 @ UCL CYCL01 (Room E.349))

    Speakers:

  • 14:00-14:50 Grégoire Naisse (UCL)
    • Categorification of Verma modules

  • 15:20-16:10 Ruslan Maksimau (Montpellier)
    • Higher level affine Hecke algebras



    Seminar 4 (20 februari 2017 @ UCL CYCL01)

    Speakers:

  • 14:00-14:50 Johan Oinert (Blekinge Institute of Technology, Sweden)
    • Epsilon-strongly group graded rings and partial skew group(oid) rings

  • 15:20-16:10 Peng Shan (Univ. Paris Sud (Paris-Orsay))
    • Categorification of quantum symmetric pairs



    Seminar 3 (6 februari 2017 @ ULB building N.O. "Salle de profs, 9th floor")

    Speakers:

  • 14:30-15:20 Ehud Meir
    • Hopf algebras via geometric invariant theory

  • 15:30-16:20 Christina Vasilakopoulou
    • measuring coalgebras



    2016

    Seminar 2 (12 december 2016 @ ULB building N.O. "Salle Solvay")

    Speakers:

  • 15:00-15:50 Jonas Wahl (KU Leuven)
    • Free wreath product quantum groups and standard invariants of subfactors

  • 16:00-16:50 Paolo Saracco (University of Turin)
    • A reconstruction theorem for coquasi-bialgebras with preantipode



    Seminar 1 (7 november 2016 @ VUB room G6.324)

    Speakers:

  • 15:05-15:55: Stefan Waldmann (University of Würzburg)
    • A universal construction of universal deformation formulas and Drinfel'd twists

  • 16:05-16:55: Ivo Dell'Ambrogio (Université de Lille)
    • Monadicity of restriction functors and spans of groupoids



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