Zurückliegende Veranstaltungen

Conference on "100 Years of Artin's Primitive Root Conjecture", August 9–13, 2027

This conference marks the centenary of Artin's celebrated 1927 conjecture on primitive roots, one of the most influential and enduring open problems in number theory. Over the past century, Artin's conjecture has inspired fundamental developments in both analytic and algebraic number theory, including deep connections with $L$-functions, sieve methods, Galois and Kummer theory, arithmetic statistics, modular forms, and arithmetic geometry.

Geordie Williamson will deliver the Friedrich Hirzebruch lecture 2026 on November 3, at 18:30h at the University Club Bonn on

   "AI and humanity's long conversation".

The annual Friedrich Hirzebruch Lecture is jointly organized by the Max Planck Institute for Mathematics and the Hausdorff Center for Mathematics. The lectures are for a general audience and aim at illustrating the relation between mathematics and art, society, and other fields. If you would like to attend, you are kindly requested to register here:

The classical Freudenthal Suspension Theorem is the statement that, given a space X, the connectivity of the unit map X -> ΩΣX of the loop-suspension adjunction is (roughly) twice the connectivity of X. In this talk, I will discuss the setting of oriented (or directed) homotopy theory, in which spaces are replaced by higher, i.e. (∞,ω)-, categories and the cartesian product by the Gray tensor product, and generalize the Freudenthal Suspension Theorem in this context. This gives, in particular, evidence for a yet-elusive "oriented topos theory".