- The Fourth ISAAC Congress was held at York University in Toronto, Canada from August 11, 2003 to August 16, 2003.
- The International Conference on Pseudo-Differential Operators and Related Topics was held at Växjö University, Sweden from June 22, 2004 to June 25, 2004.
- The Fifth ISAAC Congress was held at Università di Catania , Italy from July 25, 2005 to July 30, 2005. Professor Joachim Toft of Växjö University in Sweden and Professor M. W. Wong of York University in Canada organized a special session on pseudo-differential operators.
- The Centro Internazionale Matematico Estivo (CIME) courses entitled “Pseudo-Differential Operators, Quantization and Signals”, organized by Luigi Rodino and M. W. Wong, was held in Cetraro, Italy from June 19, 2006 to June 24, 2006.
- “ISAAC Workshop on Pseudo-Differential Operators: PDE and Time-Frequency Analysis” will be held at the Fields Institute in Toronto from December 11, 2006 to December 15, 2006. (http://www.fields.utoronto.ca/programs/scientific/06-07/ISAAC/)
- The Sixth ISAAC Congress will be held at the Middle East Technical University in Ankara, Turkey from August 13, 2007 to August 19, 2007.
- The Seventh ISAAC Congress will be held at Imperial College London, England on July 13-18, 2009.
- The Eighth ISAAC Congress will be held at the Friendship University of Russia (Moscow) on August 22-27, 2011.
- The Nineth ISAAC Congress will be held at the Pedagogical University of Cracow on August 5-9, 2013.
- ISAAC_CRM Conference on Fourier Analysis and Approximation Theory (http://www.crm.cat/en/Activities/Pages/ActivityDescriptions/Fourier-Analysis.aspx)
- The Tenth ISAAC Congress will be held at the University of Macau on August 3-8, 2015.
- The Eleventh ISAAC Congress will be held at Linnaeus University in Va\”xj\”o, Sweden on August 14-18, 2017.
- The Twelfth ISAAC Congress will be held at the University of Aveiro in Portugal on July 29-August 2, 2019.
- The Thirteenth ISAAC Congress will be held at the Ghent University on JAugust 2-6, 2021.
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