Time: 15h15, Friday, 25/2/2022

Join Zoom Meeting

https://us02web.zoom.us/j/89603210669?pwd=dDJyYnJHd3A5WlR1cFFkRUlYa3loUT09

Meeting ID: 896 0321 0669
Passcode: 340252

Abstract: Abstract: Motivic cohomology is a hypothetical cohomology theory for algebraic schemes, including algebraic varieties, over a given field, that can be seen as the counterpart in algebraic geometry to the singular cohomology theory in topology. It‘s construction was completed for smooth varieties, but for singular ones the situation was not clear.

In this talk, I will sketch some recent attempts of mine to provide an algebraic-cycle-based functorial model for the motivic cohomology of singular algebraic schemes, via formal schemes and some ideas from derived algebraic geometry. As this is very complicated, as an illustration I will give an example on the concrete case of the fat points, where the situation is simpler, but not still trivial.

For general information of the AGEA seminar, please check out https://sites.google.com/ncts.ntu.edu.tw/agea-seminar

or the mirror site

http://www.math.ntu.edu.tw/~jkchen/agea-seminar.html