Combinatorics and Physics: Mini-Workshop on Renormalization, December 15-16, 2006, Max Planck Institut Für Mathematik, Bonn, Germany : Conference on Combinatorics and Physics, March 19-23, 2007, Max Planck Institut Für Mathematik, Bonn, Germany

Computation and Combinatorics in Dynamics, Stochastics and Control: The Abel Symposium, Rosendal, Norway, August 2016

Periods in Quantum Field Theory and Arithmetic: ICMAT, Madrid, Spain, September 15 – December 19, 2014