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

Time: Wed 2019-09-04 11.00 - 12.00

Location: SU, room 306

Participating: Eric Ahlqvist, KTH

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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.