With this letter I would like to express my grave concern about the upcoming International Congress of Mathematicians ICM 2026 in Philadelphia, USA.
"Now, two weeks after launching the petition, we want to share background regarding our motivations for developing this petition, some initiatives and anecdotes that have been shared with us from the many signatories (spanning 70 countries), and most importantly, possible directions to continue building on this energy for future mobilizations."
In Spanish: https://gerardodelval.com/2026/04/06/cientificos-de-eeuu-exigen-trasladar-el-icm-2026-congreso-internacional-de-matematicas-fuera-de-estados-unidos/