Maciej Zworski
![Zworski in 2010](https://upload.wikimedia.org/wikipedia/commons/c/c6/Maciej_Zworski_2010_%28re-scanned%29.jpg)
He was an invited speaker at International Congress of Mathematicians in Beijing in 2002, and a plenary speaker at the conference Dynamics, Equations and Applications in Kraków in 2019. Provided by Wikipedia
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