# Conferences

## 2021

- Noncommutative algebra, probability and analysis in action

Alfried Krupp Kolleg, Greifswald, Germany

Sept 20-25, 2021*Talk:*Hochschild cohomology for easy quantum groups - Fifth annual conference of the SFB-TRR 195

RWTH Aachen, Germany

Sept 13-16, 2021*Talk:*Quantum isomorphisms of graphs - Forschungstage Informatik 2021

Saarland University, Saarbrücken

June 22, 2021*Talk/Group phase:*Zählprobleme in der Kombinatorik - Quantum Groups Seminar

online seminar

June 21, 2021*Talk:*Orthogonal vs. Unitary in the case of "easy" quantum groups

Slides - Mathematics Colloquium Series

NYU, Abu Dhabi

May 10, 2021*Talk:*Quantum permutations

Slides - North Atlantic Noncommutative Geometry Seminar

Jan 20, 2021*Talk:*Quantum symmetries of graphs

Slides, Recording

## 2020

- GAG seminar (Groups, Analysis, Geometry)

William & Mary, USA

Oct 28, 2020*Talk:*Quantum automorphism groups of finite graphs: a survey

Slides, PhD thesis Simon Schmidt - Topological quantum groups,
*C**-tensor categories, and subfactors

Texas A & M, USA***** cancelled *****

(was: July 27 - 31, 2020)*Minicourse lecturer:*Introduction to easy quantum groups and their classification - Virtual Noncommutative Analysis Weekly Seminar

July 29, 2020*Talk (virtual):*Compact matrix quantum groups and their representation theory

Slides - Seminar on Lie Theory

Cordoba, Argentina

June 29, 2020*Talk (virtual):*Classification of compact matrix quantum groups

Slides - ISem23 - Evolutionary Equations, final workshop

(Online)

June 25, 2020*Talk (virtual):*Dynamical systems and crossed products of C*-algebras

Slides - Free probability - on the occasion of Roland Speicher's 60th birthday

Saarbrücken, Germany***** cancelled *****

(was: June 8 - 12, 2020)*Organizer*, together with Michael Brannan, James Mingo, Jonathan Novak and Dan-Virgil Voiculescu - Entangling Non-commutative Functional Analysis and Geometry of Banach Spaces

Centre International de Rencontres Mathematiques, Luminy***** cancelled *****

(was: May 11 - 15, 2020) - Deligne categories and quantum groups

Aachen, Germany***** cancelled *****

(was: March 30 - April 3, 2020)*Organizer*, together with Johannes Flake, Gerhard Hiss and Laura Maassen - Seminaire theorie de Lie, geometrie et analyse (LieGA)

Metz, France

January 23, 2020*Talk:*An introduction to quantum groups and quantum symmetries

## Earlier

## 2019

- Oberwolfach Miniworkshop 1941a Operator algebraic quantum groups

Oberwolfach, Germany

October 6 - 12, 2019*Organizer*, together with Michael Brannan, Martijn Caspers and Anna Wysoczanska-Kula - DMV-Jahrestagung 2019, Mini-Symposium Computeralgebra

Karlsruhe, Germany

23-26 September, 2019*Talk:*Representation categories of quantum groups and computational approaches - 3rd annual meeting SFB-TRR 195

Saarbrücken, Germany

September 9 - 13, 2019*Talk:*Quantum symmetries and computations - Quantum groups and their analysis

UiO University of Oslo, Norway

Summer school: July 29 - August 2, 2019

Workshop: August 5 - 9, 2019*Organizer*, together with Kurusch Ebrahimi-Fard and Makoto Yamashita - Oberseminar Mathematische Logik

University of Bonn, Germany

June 19, 2019*Talk:*Forcing in operator algebras - A.RT-Seminar (Algebra & Representation Theory)

RWTH Aachen, Germany

June 17, 2019*Talk:*How to describe representation categories of some linear groups and some quantum groups - Ergodic Theorems

Workshop of the 22nd Internetseminar (see also our local edition)

Bergische Universität Wuppertal, Germany

June 10 - 16, 2019

Participation as coordinator of project 13: Noncommutative ergodic theorems - Journées Thématiques : Cohomology of compact quantum groups and related topics

Besancon, France

March 21 - 22, 2019*Talk:*Unitary half-liberations - New developments in free probability and applications

Centre de recherches mathematiques, Montreal, Canada

March 4 - 15, 2019*Talk:*News from easy and non-easy quantum groups - Retreat SFB-TRR 195

Bad Münster am Stein, Germany

February 18 - 21, 2019 - Séminaire Matrices et graphes aléatoires (MEGA)

Institut Henri Poincaré, Paris

February 8, 2019*Talk:*Quantum symmetries of finite graphs and of noncommutative notions of independence - Geometry Seminar

Dresden, Germany

January 15, 2019*Talk:*Quantum symmetries of finite graphs

- Oberwolfach Workshop 1849 Free Probability Theory

Oberwolfach, Germany

December 3 - 7, 2018*Talk:*Quantum groups by example - Cohomology of quantum groups and quantum automorphism groups of finite graphs

Saarbrücken, Germany

October 8 - 12, 2018*Organizer*, together with Simon Schmidt - Second annual meeting of the DFG collaborative research center SFB-TRR 195

Tübingen, Germany

September 24 - 28, 2018 - Quantum homogeneous spaces

International Centre for Mathematical Sciences, Edinburgh, UK

June 11 - 15, 2018*Talk:*Quantum spaces arising from partitions of sets - NCGOA 2018: C*-algebras and Dynamics

Münster, Germany

May 14 - 19, 2018*Talk:*Quantum symmetries of graph C*-algebras (PDF) - Oberwolfach Workshop 1819 Interactions between operator space theory

and quantum probability with applications to quantum information

Oberwolfach, Germany

May 6 - 12, 2018*Talk:*Quantum automorphism groups of graphs - 50th Anniversary meeting of the North British Functional Analysis Seminar

Edinburgh, UK

April 12 - 14, 2018*Talk:*Quantum groups by example - Lancaster Analysis Days 2018

Lancaster, UK

April 10 - 11, 2018*Talk:*C*-algebras and quantum spaces arising from partitions (PDF) - GDMV 2018 - Section Functional Analysis

Annual Meeting of the German Mathematical Society (DMV)

Paderborn, Germany

March 5 - 9, 2018*Talk*: Quantum symmetry - basic idea and concrete examples - Workshop tensor categories, Hopf algebras and quantum groups

supported by the SFB-TRR 195

Marburg, Germany

January 22 - 26, 2018*Organizer*, together with Istvan Heckenberger and Sonia Natale

- Introduction to computer algebra systems

Mini-workshop

Mini-workshop, part of the graduate programme of the SFB-TRR 195

Saarbrücken, Germany

November 28 - 30, 2017*Organizer* - First annual meeting of the DFG collaborative research center SFB-TRR 195

RWTH Aachen, Germany

September 25 - 28, 2017*Talk:*Some computational problems when working on compact quantum groups - Summer school on Mathematical aspects of quantum information

Institut des Etudes Scientiques de Cargese, Corsica

September 4 - 8, 2017*Lecture:*Introduction to free probability

Slides: Lecture 1: Free Probability Lecture 2: Quantum Groups Lecture 3: Links - Part 1 2 3 4 - Joint Seminar on Algebra and Analysis

Hannover, Germany

July 6, 2017*Seminar talk:*Quantum symmetry, C*-algebras and combinatorics - Operator algebras seminar

KU Leuven, Belgium

Feburary 10, 2017*Seminar talk*: Quantum groups based on spatial partitions

- Analytic versus Combinatorial in Free Probability

BIRS workshop

Banff, Canada

December 4 - December 9, 2016*Talk: Quantum groups versus combinatorics in free probability*Video of the talk - Compact Quantum Groups

Satellite event of the 7th European Congress of Mathematics (July 18 - 22, 2016, Berlin, Germany)

Alfried Krupp Wissenschaftskolleg Greifswald, Germany

July 11 - 15, 2016*Organizer*, together with Uwe Franz, Malte Gerhold and Adam Skalski - Quantum groups: geometry, representations, and beyond

Oslo, Norway

May 9 - 13, 2016*Talk:*Quantum groups with partial commutation relations - Micro workshop on
*SU_q(3)*

Saarbrücken

Jan 18 - 22, 2016*Organizer*

- Analysis seminar

Wroclaw, Poland

October 15, 2015*Seminar talk:*From Woronowicz's Tannaka-Krein result to examples of combinatorial quantum groups - Noncommutative Geometry seminar

IMPAN, Warsawa, Poland

October 12, 2015*Seminar talk:*From Woronowicz's Tannaka-Krein result to examples of combinatorial quantum groups - Operator algebras seminar

KU Leuven, Belgium

October 2, 2015*Seminar talk:*From combinatorics to (easy) quantum groups and more - George Boole Mathematical Sciences Conference

Theme 8: Quantum Probabilistic Symmetries & Quantized Boolean Algebras

Cork, Ireland

August 17 - 28, 2015*Talk:*Unitary easy quantum groups - Quantum Groups and Quantum Information Theory

Workshop funded by the Fields Institute, the London Mathematical Society, the ERC Advanced

Grant held by Roland Speicher, and the ERC Starting grant held by Matthias Christandl

(see also page 15 and 16 in the Fields report)

Herstmonceux, UK

July 13 - 17, 2015*Organizer*, together with Benoit Collins, James Mingo, Ashley Montanaro and Maria Grazia Viola - Oberwolfach Workshop 1524 Free Probability

Oberwolfach, Germany

June 7 - 13, 2015 - Analysis seminar

Aberdeen, UK

March 30, 2015*Seminar talk:*Quantum groups meet free probability - Analysis and probability seminar

Lancaster, UK

March 25, 2015*Seminar talk:*Quantum groups meet free probability - Mathematical physics seminar

Cardiff, UK

March 19, 2015*Seminar talk:*Quantum groups meet free probability - Algebraic and Analytic Aspects of Quantum Levy Processes

(see also here)

Alfried Krupp Wissenschaftskolleg Greifswald, Germany

March 9 - 13, 2015*Talk:*Easy quantum groups go unitary - how combinatorics provides an easy access to quantum groups - Analysis seminar

Glasgow, UK

March 4, 2015*Seminar talk:*Quantum groups meet free probability - Lecture series on (easy) quantum groups
*Lecturer*for eight lectures on quantum groups

IMSc Chennai, India

January 5 - 24, 2015

Playlist of the lectures on YouTube

Lecture Notes of the Chennai lectures (published in 2017)

- Free Probability and Random Matrices

Bielefeld, Germany

September 22 - 25, 2014*Talk:*Quantum Groups in Free Probability - IWOTA 2014

International Workshop on Operator Theory and its Applications

yearly conference, this time held in Amsterdam, Netherlands

July 14 - 18, 2014*Organizer*of the Special Session on Free probability and operator theory,

together with Serban Belinschi and Roland Speicher - Quantum Symmetries in Free Probability

Mini-workshop on easy quantum groups and other symmetries in free probability

Saarbrücken, Germany

March 31 - April 4, 2014*Organizer*, together with Roland Speicher*Talk:*Partitions and quantum groups

- Masterclass on Free Probability and Operator Algebras

Münster, Germany

September 2 - 6, 2013*Organizer*, together with Nicolai Stammeier*Lecture:*Easy quantum groups - Focus Program on Noncommutative Distributions in Free Probability Theory

Focus program by the Fields Institute, Toronto, Canada

July 2013*Talk:*Partitions and quantum groups

see also the video archive of the Fields Institute*Lecture (in the inter-workshop program):*Quantum groups and their relation with free probability

see also the video archive of the Fields Institute - Operator algebras seminar

KU Leuven, Belgium

March 15, 2013*Seminar talk:*Easy quantum groups - a combinatorial class of quantum groups - PLLUS Workshop

Meeting of the probability groups of four universities:

Technische Universität Kaiserslautern, University of Luxembourg,

Universite de Lorraine, Universität des Saarlandes

third edition held in Saarbrücken

Febr 21 - 22, 2013*Local organizer,*together with Roland Speicher

- Arbre de Noel

Annual Christmas Conference of the Non-Commutative Geometry GDR

Universite de Lorraine, Metz, France

December 6 - 8, 2012*Talk:*Easy quantum groups - a combinatorial class of quantum groups - Séminaire d'analyse fonctionelle

Besançon, France

27 November, 2012*Seminar talk:*Easy quantum groups - a combinatorial class of quantum groups - Oberwolfach Workshop 1244

C*-Algebras, Dynamics, and Classification

Oberwolfach, Germany

October 28 - November 3, 2012*Talk:*The classification of easy quantum groups is difficult - Minisymposium on Free Probability and Random Matrices

(part of the DMV Annual Meeting 2012)

Annual Meeting of the German Mathematical Society

Saarbrücken, Germany

September 17 - 20, 2012*Local organizer,*together with Roland Speicher*Talk (Section Functional analysis):*C*-algebras generated by isometries with twisted commutation relations - Canadian Operator Symposium 2012

Conference at Queen's University, Kingston, Canada

May 21 - 25, 2012*Talk:*C*-algebras generated by isometries with twisted commutation relations - Masterclass on quantum groups

University of Copenhagen

March 5 - 9, 2012*Talk:*On the classification of easy quantum groups - PLLUS Workshop

Meeting of the probability groups of four universities:

Technische Universität Kaiserslautern, University of Luxembourg,

University Nancy 1, Universität des Saarlandes

second edition held in Luxemburg

March 1 - 2, 2012

- Non-commutative harmonic analysis

14th Workshop at Bedlewo, Poland

Sept 25 - Oct 1, 2011*Talk:*Easy quantum groups (joint with Roland Speicher) - PLLUS Workshop

Meeting of the probability groups of four universities:

Technische Universität Kaiserslautern, University of Luxembourg,

University Nancy 1, Universität des Saarlandes

first edition held in Kaiserslautern

Febr 10 - 11, 2011 - Bialgebras in Free Probability

Program at Erwin Schrödinger Institute, Vienna

Febr 1 - Apr 22, 2011

Oberwolfach Workshop 1010

C*-Algebras

Oberwolfach, Germany

March 7 - 13, 2010*Reporter* (for the Oberwolfach Report 13/2010)

- Masterclass on the classification of C*-algebras

University of Copenhagen

November 16 - 27, 2009*Talk:*Twists of isometries - Focused semester on KK-theory and its applications

Münster, Germany

May 4 - July 24, 2009*Talk:*Twists of isometries

## Postal address

Saarland University

Department of Mathematics

Postfach 15 11 50

66041 Saarbrücken

Germany

## Physical address

Saarland University

Campus building E 2 4

66123 Saarbrücken

Germany