Representation theory and geometry of loop spaces

9-13 January 2023

Laboratoire de Mathématiques d'Orsay


The aim of the conference is to explore representation theory of algebras with an emphasis on those which arise from physical considerations rather recently. They include vertex algebras and diagrammatic algebras (that exhibits some cluster algebra structure) whose representation categories are tightly connected with those associated to semisimple Lie algebras and Hecke algebras. This workshop intends to investigate the relation between these representation theories, by bringing together researchers from geometric representation theory, vertex algebra theory and the geometry of arc and loop spaces. 


All talks will be held in the room 3L15 in the third floor of the LMO.

Coffee breaks will be held in the hall, in front of the main entrance.



The conference is organized as part of the PHC SAKURA program. 


  • Syu KatoKyoto University, Japan. 
  • Anne MoreauUniversité Paris-Saclay, Orsay, France. 


List of speakers  

  • Noriyuki Abe, University of Tokyo, Japan.
  • Alexis Bouthier, Sorbonne Université, Paris, France.
  • Kęstutis Česnavičius, Université Paris-Saclay, Orsay, France.
  • Stéphane Gaussent, Institut Camille Jordan, Saint-Etienne, France.
  • Naoki Genra, Kavli IPMU, University of Tokyo, Japan.
  • Tatsuyuki Hikita*, RIMS, Kyoto University, Japan.
  • Syu Kato, Kyoto University, Japan.
  • Kazuya Kawasetsu, Kumamoto University, Japan.
  • Emmanuel Letellier, Université Paris Cité, France. 
  • Leonardo Maltoni, Université de Versailles, France.
  • Ivan Mirković, University of Zagreb, Croatie. 
  • Yuto Moriwaki, RIKEN iTHEMS, Japan.
  • Kota Murakami, Kyoto University, Japan.
  • Hironori Oya, Tokyo Institute of Technology, Japan.
  • Julien Sebag*, Université de Rennes, France.
  • Susanna ZimmermannUniversité Paris-Saclay, Orsay, France.


* Online speakers.  



Monday 9

  • 10h-10h50: Stéphane Gaussent (lecture 1)
  • coffee break
  • 11h10-12h: Alexis Bouthier (lecture 1)
  • lunch
  • 14h30-15h20: Julien Sebag* (lecture 1)
  • coffee break
  • 15h40-16h30: Syu Kato (talk)


Tuesday 10

  • 9h-9h50: Kota Murakami (lecture 1)
  • coffee break
  • 10h10-11h: Hironori Oya (talk)
  • 11h10-12h: Noriyuki Abe (talk)
  • lunch
  • 14h-15h: Syu Kato, part of the SAGA (algebraic and arithmetic geometry seminar)
  • coffee break
  • 15h30-16h20: Leonardo Maltoni (talk)


Wednesday 11

  • 9h-9h50: Alexis Bouthier (lecture 2)
  • coffee break
  • 10h10-11h: Susanna Zimmermann (talk)
  • 11h10-12h: Yuto Moriwaki (talk)
  • free afternoon


Thursday 12

  • 10h-10h50: Tatsuyuki Hikita* (lecture 1)
  • coffee break
  • 11h10-12h: Emmanuel Letellier (talk)
  • lunch
  • 14h30-15h20: Kota Murakami (lecture 2)
  • coffee break
  • 15h40-16h30: Stéphane Gaussent (lecture 2)


Friday 13

  • 9h-9h50: Kazuya Kawasetsu (talk)
  • coffee break
  • 10h10-11h: Tatsuyuki Hikita* (lecture 2)
  • 11h10-12h: Kęstutis Česnavičius (talk)
  • lunch
  • 14h30-15h20: Naoki Genra (talk)
  • coffee break
  • 15h40-16h30: Ivan Mirković (talk)


* Online talks