# Eric Ahlqvist: The étale cohomology ring of the ring of integers of a number field

**Time: **
Wed 2019-09-04 11.00 - 12.00

**Lecturer: **
Eric Ahlqvist, KTH

**Location: ** SU, room 306

Abstract: For the ring of integers of a number field, Carlson and

Schlank computed the étale cohomology ring with coefficients in a

finite cyclic group with n=2 elements. In this talk we explain how to

extend this result to arbitrary n and discuss some possible

applications. Joint work with Magnus Carlson.