Presentation of the book "Open Problems in Mathematics" (edited jointly with John F. Nash), in the May 2016 Issue of the Notices of the Americal Mathematical Society, dedicated to John F. Nash.

Invited "In Memoriam" article dedicated to Freeman J. Dyson, for the July 2020 Issue of the Newsletter of the London Mathematical Society.

List of contributors ofproblems in the column "Solved & Unsolved Problems" of the Newsletter of the European Mathematical Society, since September 2017 that I have been in charge of it.

Office Address: Institute of Mathematics, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland