# Upcoming Talks

The seminar will meet at 4:30 on Monday in Zoom unless otherwise noted.

http://math.mit.edu/topology/topology_seminar.ics

• Dec 062021

### Dylan Wilson (Harvard University)

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#### Calculus in higher chromatic characteristic

The seminar will meet at 4:30 PM in 2-131 (in person only).

Trying to do calculus in characteristic p returns strange results like the Cartier isomorphism: the deRham *cohomology groups* of a smooth F_p-variety looks the same as the deRham complex back again (up to a twist). This turns out to be a prototype for a result in the Hochschild homology of smooth algebras in characteristic p. In this talk I'll explain this background and give new examples of a Cartier-like isomorphism in 'higher chromatic characteristics' (e.g. for connective real K-theory and connective topological modular forms).

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Email Jeremy Hahn For inquiries about the seminar.

The mailing list for this seminar is the MIT topology google group.
Email Mike Hopkins if you want to join the list.