We strongly agree with the statements of the Alliance of Science Organisations in Germany [2], the European Mathematical Society [3], and the President of the Max Planck Society [4].
We are in strong solidarity with our mathematical friends and colleagues in Ukraine. As a practical help, our guest program [5] can offer a medium-term perspective for Ukrainian scientists.
Links:
[1] https://www.mpim-bonn.mpg.de/taxonomy/term/44
[2] https://www.mpg.de/18369097/alliance-of-science-organisations-in-germany-statement-on-russias-attack-on-ukraine.pdf
[3] https://euromathsoc.org/news/statement:-european-mathematical-society-solidarity-with-partners-in-ukraine---consequences-for-the-mathematical-community-56
[4] https://www.mpg.de/18354975/statement-mpg-president-stratmann-war-ukraine
[5] https://www.mpim-bonn.mpg.de/node/76