Ramification in Higher Algebra

John Berman (University of Massachusetts)

I will review the theory of ramification in number theory and then show that being totally ramified or unramified is equivalent to a natural condition in higher algebra. This leads to a much simplified calculation of THH of a ring of integers in a number field, relying on ramified descent (a kind of weaker etale descent).

Start date
Tuesday, Aug. 2, 2022, 3 p.m.
End date
Tuesday, Aug. 2, 2022, 3:45 p.m.

Keller 3-180