Noncommutative Geometry at IWOTA 2023

We are organizing a special session on Noncommutative Geometry during the 34th International Workshop on Operator Theory and its Applications (IWOTA 2023) at the University of Helsinki, Finland.

Dates: July 31 – August 4, 2023



During the last few years, the mathematical field of noncommutative geometry has witnessed a lot of scientific activity. This includes the intriguing development of unbounded KK-theory and the recent analysis of several different quantum metric spaces, with exciting links to operator algebras. These two main research themes -unbounded KK-theory and quantum metric spaces- will be the focus of the present special session on noncommutative geometry.


  • Konrad Aguilar, Pomona College
  • Joakim Arnlind, Linköping University (tbc)
  • Are Austad, University of Southern Denmark
  • Shantanu Dave, University Vienna
  • Koen van den Dungen, Universität Bonn
  • Carla Farsi, University of Colorado Boulder
  • Priyanga Ganesan, University of California San Diego
  • Yufan Ge, Universiteit Leiden
  • Debashish Goswami, ISI, Kolkata
  • Jens Kaad, University of Southern Denmark
  • Giovanni Landi, University of Trieste
  • Malte Leimbach, Radboud University
  • Ying-Fen Lin, Queen’s University Belfast
  • Franz Luef, NTNU
  • Bram Mesland, Leiden University
  • Chi-Keung Ng, Chern Institute, Nankai University (tbc)
  • Paolo Piazza, Sapienza di Roma
  • Sushil Singla, Indian Institute of Science
  • Walter van Suijlekom, Radboud University
  • Kanat Tulenov, University Gent
  • Jacopo Zanchettin, SISSA
  • Sophie Emma Zegers, Charles University in Prague

Tentative schedule

2:30-3:00Konrad AguilarThe strongly Leibniz property and the Gromov–Hausdorff propinquity 
3:00-3:30Are AustadDetecting ideals in reduced crossed product C*-algebras of topological dynamical systems
3:30-4:00Jens KaadSpectral metrics on quantum projective spaces
4:00-4:30Carla FarsiMetric spectral triples, Gromov-Hausdorff limits, and inductive limits
2:30-3:00Sophie Emma ZegersSplit extensions and KK-equivalences for quantum flag manifolds
3:00-3:30Yufan GeSubproduct systems from SU(2)-representations
3:30-4:00Debashish GoswamiQuantum Isometry Groups of compact metric space
4:30-5:00Paolo PiazzaPrimary and Secondary Invariants of Dirac operators on G-proper manifolds
5:00-5:30Chi-Keung NgReconstructing von Neumann algebras from metric spaces
5:30-6:00Walter van SuijlekomTolerance relations and operator systems
2:30-3:00Bram MeslandThe Levi-Civita connection on modules of non commutative differential forms
3:00-3:30Joakim ArnlindLevi-Civita connections for a class of noncommutative minimal surfaces 
3:30-4:00Giovanni LandiHopf algebroids, Atiyah sequences and noncommutative gauge theories
4:30-5:00Priyanga GanesanA quantum isometry game for quantum metric spaces
5:00-5:30Kanat TulenovOn Fourier multipliers on quantum tori and applications
5:30-6:00Franz LuefMetaplectic transformations for Heisenberg modules
11:30-12:00Sushil SinglaSequence of operator algebras converging to odd spheres in the quantum Gromov-Hausdorff distance
12:00-12:30Malte LeimbachOn spectral truncations of tori
12:30-1:00Jacopo ZanchettinMorita equivalence for the Erhesmann-Schauenburg Hopf algebroid
1:00-2:30Lunch break
2:30-3:00Koen van den DungenGeneralised Dirac-Schrödinger operators

Register/more info:

Please inform one of the organizers if you want to participate or give a talk in this session. Also for further inquiries, please contact one of us, eg. via

Researchers from the EU in need of funding are suggested to consider applying for a conference grant from the Cost Action CaLISTA (Deadline March 24, 2023).

Junior researchers from the USA and taking part in IWOTA may approach Raul Curto for a possible funding from NSF.