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- Representation theory and noncommutative geometry, American Institute of Mathematics
- Kolloquium Graduiertenkolleg 2491 Fourier Analysis and Spectral Theory, University of Göttingen
- Research seminar "Geometric and Harmonic Analysis", joint research seminar of the Universities of Aarhus and Paderborn
- Greek Mathematical Seminar, joint online seminar of the departments of mathematics of the University of Athens, the University of Crete, the University of Cyprus, the University of Ioannina, the National Technical University of Athens, the University of Patras and the Aristotle University of Thessaloniki
- ℕ-cube: ℕordic ℕumber theory ℕetwork