Here is a 3-paragraph summary of the blog post for mathopen.com:
A group of 25 Fields Medallists, the most prestigious award winners in mathematics, have come together to sign a formal declaration addressing what they describe as a severe misalignment of artificial intelligence in mathematics. The declaration grew out of discussions among this distinguished group over the course of just one week, reflecting a sense of urgency around the concerns they wished to raise publicly.
The signatories have published their declaration on a dedicated web page and are actively inviting further signatures from the broader mathematical community. The effort draws comparison to the Leiden Declaration, suggesting it follows a similar model of open, collective sign-on to signal widespread concern among researchers and scholars in the field.
While the full details of the declaration are not reproduced in this post, the title makes clear that the core issue centers on how AI systems are being developed or applied in ways that do not align well with the values, standards, or needs of serious mathematical research. The involvement of so many Fields Medallists gives this statement significant weight and signals that leading mathematicians believe the relationship between AI and mathematics deserves careful, critical scrutiny.