The HUJI-BGU-Zoom Workshop in Arithmetic

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The HUJI-BGU-Zoom Workshop in Arithmetic meets twice a semester, alternating locations, starting from the year 5780. All are welcome.
The workshop is currently organized by Ari Shnidman (HUJI) and Daniel Disegni (BGU).

3rd meeting: Monday March 30th, 2020 - Zoom

The theme of the day will be the interplay of arithmetic, geometry and harmonic analysis on locally symmetric spaces.


14.00 - 15.10 Amitay Kamber (HUJI), Cohomology of locally symmetric spaces

15.30 - 16.50 Tony Feng (MIT), The Galois action on symplectic K-theory


The video is here. Amitay's talk is first and Tony's talk begins around the 1:00:30 mark.

Abstracts of talks

Amitay Kamber (14-15.10)
I will introduce locally symmetric spaces, and explain how their cohomology is related to automorphic forms and, at least in some cases, Galois representations.

Tony Feng (15.30 - 16.50)
A fundamental principle in number theory is that the cohomology of locally symmetric spaces carries interesting Galois representations. However, locally symmetric spaces are also associated with other kinds of algebraic invariants, such as algebraic K-theory, and one could also try to study the Galois action on them. In joint work with Soren Galatius and Akshay Venkatesh, we define a symplectic version of algebraic K-theory for the integers, and compute the Galois action on it, which turns out to be “universal” in an appropriate sense.

Dates to be saved


Past meetings

2nd meeting, January 13th, 2020 (BGU)
1st meeting, December 16th, 2019 (HUJI)


HUJI: Einstein Institute of Mathematics, Hebrew University Giv'at Ram Campus, Jerusalem.
BGU: Deichmann Building for Mathematics (building 58), Ben-Gurion University of the Negev, Be'er Sheva.

Directions to the physical locations: you may use Google Maps or Moovit. (Please note that Google is sometimes optimistic about the travel time of local buses.)