2019 Aug 07

# NT & AG Seminar: Sandeep Varma "Bernstein projectors for SL(2)"

2:00pm to 3:00pm

## Location:

Ross 70
Let G be the group SL(2) over a finite extension F of Q_p, p odd. For a fixed r ≥ 0, we identify the elements of the Bernstein center of G supported in the Moy-Prasad G-domain G_{r^+}, by characterizing them spectrally.
We study the behavior of convolution with such elements on orbital integrals of functions in C^∞_c(G(F)), proving results in the spirit of semisimple descent.
These are ‘depth r versions’ of results proved for general reductive groups by J.-F. Dat, R. Bezrukavnikov, A. Braverman and D. Kazhdan.
2019 Nov 14

# Colloquium: Sara Tukachinsky (IAS) - Curves with boundary: Can you count them? Can you really?

2:30pm to 3:30pm

## Location:

Manchester Building (Hall 2), Hebrew University Jerusalem
Title:
Curves with boundary: Can you count them? Can you really?
Abstract:
2019 Jul 31

# T&G: Mikhail Gromov (IHES and Courant), Scalar curvature

2:00pm to 3:00pm

## Location:

Room B221, Rothberg Building, Jerusalem
2019 Jul 31

# Prof. Mikhail Gromov lecture: "Scalar Curvature"

## Lecturer:

Prof. Mikhail Gromov (IHES, France and Courant Institute, New York University)
2:00pm to 3:30pm

## Location:

Room B221, Rothberg Building, Jerusalem
2020 May 07

# Colloquim (canceled...)

2:30pm to 3:30pm

## Location:

Manchester Building (Hall 2), Hebrew University Jerusalem
2021 May 09

# The 23rd Midrasha Mathematicae: o-minimality and its applications in diophantine geometry and Hodge theory

Sun, 09/05/2021 (All day) to Fri, 14/05/2021 (All day)

## Location:

Israel Institute for Advanced Studies, The Hebrew University of Jerusalem
2019 Aug 05

# Basic Notions: Ron Donagi (University of Pennsylvania) “On singularities of spectral curves and SCFTs of class S”

11:00am to 12:00pm

Ross 70
2019 Dec 19

# Colloquium Zabrodsky lecture 1: Paul Seidel (MIT)- The symplectic topologist as a dynamicist

2:30pm to 3:30pm

## Location:

Manchester Building (Hall 2), Hebrew University Jerusalem
The development of symplectic topology was motivated by Hamiltonian mechanics. It has been particularly successful in addressing one specific aspect, namely fixed points and periodic points of discrete-time Hamiltonian systems. I will explain how such applications work, both in older and more recent examples.
2020 Jan 16

# Colloquium Dvoretzky lecture: Sylvia Serfaty (NYU): Systems of points with Coulomb interactions

2:30pm to 3:30pm

## Location:

Manchester Building (Hall 2), Hebrew University Jerusalem

Title: Systems of points with Coulomb interactions
Abstract:  Large ensembles of points with Coulomb interactions arise in various settings of condensed matter physics, classical and quantum mechanics, statistical mechanics, random matrices and even approximation theory, and they give rise to a variety of questions pertaining to analysis, Partial Differential Equations and probability.
2019 Jun 27

# Groups and Dynamics seminar: Asaf Katz (Chicago) - An application of Margulis' inequality to effective equidistribution.

11:30am to 12:45pm

Abstract: Ratner's celebrated equidistribution theorem states that the trajectory of any point in a homogeneous space under a unipotent flow is getting equidistributed with respect to some algebraic measure. In the case where the action is horospherical, one can deduce an effective equidistribution result by mixing methods, an idea that goes back to Margulis' thesis.

2019 Jun 16

5:00pm to 6:00pm

2019 Jun 23

# Special Talk - Saharon Shelah

4:00pm to 6:00pm

## Location:

Manchester Building, Room 110

Simplicity and universality

Fixing a complete first order theory T, countable for transparency, we had known quite well for which cardinals T has a saturated model. This depends on T of course - mainly of
whether it is stable/super-stable. But the older, precursor notion of having
a universal notion lead us to more complicated answer, quite partial so far, e.g
the strict order property and even SOP_4 lead to having "few cardinals"
(a case of GCH almost holds near the cardinal). Note  that eg GCH gives a complete
2019 Jun 18

# Dynamics and probability: David Jerison (MIT) - Localization of eigenfunctions via an effective potential

2:00pm to 3:00pm

## Location:

Ross 70
We discuss joint work with Douglas Arnold, Guy David, Marcel Filoche and Svitlana Mayboroda.
Consider for the operator $L = -\Delta + V$ with periodic boundary conditions, and more
generally on the manifold with or without boundary. Anderson localization, a significant feature
of semiconductor physics, says that the eigenfunctions of $L$ are exponentially localized with
high probability for many classes of random potentials $V$. Filoche and Mayboroda introduced the
2019 Jun 17

# NT & AG Lunch: Michael Temkin "The explicit local and global class field theory"

1:00pm to 2:00pm

## Location:

Faculty lounge

I will finish the theory of Lubin-Tate, and start the last topic of this series
-- Drinfeld's elliptic modules and CFT of function fields.