2020
May
04

# Eventss

2020
May
06

# Set Theory E-Seminar: Alejandro Poveda (Universitat de Barcelona) - Sigma-Prikry forcings and their iterations

11:00am to 1:00pm

## Location:

Zoom meeting ID 243-676-331

Joint E-seminar of Bar-Ilan University and the Hebrew University

Title:

Title:

__Sigma-Prikry forcings and their iterations__
2020
May
14

# Basic Notions: Mike Hochman "Dimension of Bernoulli convolutions"

4:00pm to 5:15pm

## Location:

Join Zoom Meeting https://huji.zoom.us/j/98768675115?pwd=WnZOZUpuVmpoNGkrYWQxanNVWkQzUT09,

Abstract: The Bernoulli convolution with parameter 1/2 < t < 1 is the distribution of the random variable (+/-)t + (+/-)t^2 + (+/-)t^3 + ..., where the sequence of signs +/- form an unbiased i.i.d. random sequence. This distribution has been studied since the 1930s, and the main problem is to characterize those parameters t for which the distribution is absolutely continuous, or has full dimension. In these talks I will review the history and recent developments, leading up to P. Varju's proof a little over a year ago, that for all transcendental parameters the dimension is 1.

2020
Apr
23

# Basic Notions: Benjy Weiss "Sets of positive density contain the sumset of two infinite sets"

4:00pm to 5:15pm

Join Zoom Meeting

https://huji.zoom.us/j/98768675115?pwd=WnZOZUpuVmpoNGkrYWQxanNVWkQzUT09

Meeting ID: 987 6867 5115

Password: 153703

Video available here : https://huji.cloud.panopto.eu/Panopto/Pages/Viewer.aspx?id=e4c8ea86-dd3e-4b9e-af0f-aba600eec104

2020
Apr
30

# Basic Notions: Benjy Weiss "Sets of positive density contain the sumset of two infinite sets"

4:00pm to 5:15pm

Join Zoom Meeting

https://huji.zoom.us/j/98768675115?pwd=WnZOZUpuVmpoNGkrYWQxanNVWkQzUT09

Meeting ID: 987 6867 5115

Password: 153703

https://huji.zoom.us/j/98768675115?pwd=WnZOZUpuVmpoNGkrYWQxanNVWkQzUT09

Meeting ID: 987 6867 5115

Password: 153703

2020
May
07

# Basic Notions: Mike Hochman "Dimension of Bernoulli convolutions"

4:00pm to 5:15pm

## Location:

Join Zoom Meeting https://huji.zoom.us/j/98768675115?pwd=WnZOZUpuVmpoNGkrYWQxanNVWkQzUT09

Abstract: The Bernoulli convolution with parameter 1/2 < t < 1 is the distribution of the random variable (+/-)t + (+/-)t^2 + (+/-)t^3 + ..., where the sequence of signs +/- form an unbiased i.i.d. random sequence. This distribution has been studied since the 1930s, and the main problem is to characterize those parameters t for which the distribution is absolutely continuous, or has full dimension. In these talks I will review the history and recent developments, leading up to P.

2020
Apr
27

# Spencer Leslie [HUJI-BGU AGNT Seminar]

2:15pm to 4:00pm

## Location:

https://zoom.us/j/468718180,

Speaker: Spencer Leslie (Duke)

Title: The endoscopic fundamental lemma for unitary symmetric spaces

Abstract: Motivated by the study of certain cycles in locally symmetric

spaces and periods of automorphic forms on unitary groups, I propose a

theory of endoscopy for certain symmetric spaces. The main result is the

fundamental lemma for the unit function. After explaining where the

fundamental lemma fits into this broader picture, I will describe its

proof.

Join Zoom Meeting

Title: The endoscopic fundamental lemma for unitary symmetric spaces

Abstract: Motivated by the study of certain cycles in locally symmetric

spaces and periods of automorphic forms on unitary groups, I propose a

theory of endoscopy for certain symmetric spaces. The main result is the

fundamental lemma for the unit function. After explaining where the

fundamental lemma fits into this broader picture, I will describe its

proof.

Join Zoom Meeting

2020
Apr
20

# Charlotte Chan [HUJI-BGU AGNT Seminar]

4:30pm to 5:30pm

## Location:

https://zoom.us/j/468718180,

Join Zoom Meeting

https://zoom.us/j/468718180

Meeting ID: 468 718 180

Charlotte Chan (MIT)

Title: L-packets of S-unramified regular supercuspidal representations

https://zoom.us/j/468718180

Meeting ID: 468 718 180

Charlotte Chan (MIT)

Title: L-packets of S-unramified regular supercuspidal representations

2020
May
19

# Dynamics seminar : Michael Bersudsky (Technion) "Equidistribution of the image in the torus of sparse points on dilating analytic curves"

2:00pm to 3:00pm

Title: Equidistribution of the image in the torus of sparse points on dilating analytic curves

2020
May
05

# Dynamics Seminar: Matan Seidel (TAU): "Random Walks on Circle Packings"

2:00pm to 3:00pm

**Abstract:**A circle packing is a canonical way of representing a planar graph. There is a deep connection between the geometry of the circle packing and the proababilistic property of recurrence/transience of the simple random walk on the underlying graph, as shown in the famous He-Schramm Theorem. The removal of one of the Theorem's assumptions - that of bounded degrees - can cause the theorem to fail. However, by using certain natural weights that arise from the circle packing for a weighted random walk, (at least) one of the directions of the He-Schramm Theorem remains true.

2020
May
05

# Dynamics Lunch: Or Landesberg: "Ends of hyperbolic three manifolds and dynamics of horospherical foliations"

12:00pm to 1:00pm

**Abstract:**A circle packing is a canonical way of representing a planar graph. There is a deep connection between the geometry of the circle packing and the proababilistic property of recurrence/transience of the simple random walk on the underlying graph, as shown in the famous He-Schramm Theorem. The removal of one of the Theorem's assumptions - that of bounded degrees - can cause the theorem to fail. However, by using certain natural weights that arise from the circle packing for a weighted random walk, (at least) one of the directions of the He-Schramm Theorem remains true.

2020
Apr
22

# Set Theory E-Seminar: Jing Zhang (BIU) - Transformations of the transfinite plane

11:00am to 1:00pm

## Location:

E-seminar Zoom meeting ID 243-676-331

Joint E-seminar of Bar-Ilan University and the Hebrew University

**Title**: Transformations of the transfinite plane

**Abstract**: We discuss the existence of certain transformation functions turning pairs of ordinals into triples (or pairs) of ordinals, that allows reductions of complicated Ramsey theoretic problems into simpler ones. We will focus on the existence of various kinds of strong colorings. The basic technique is Todorcevic's walks on ordinals. Joint work with Assaf Rinot.

The Zoom meeting ID is 243-676-331

2021
Mar
08

# Joint meeting of the Israel Mathematical Union and the German Mathematical Society

Mon, 08/03/2021 (All day) to Wed, 10/03/2021 (All day)

## Location:

Hebrew University of Jerusalem

First Joint Meeting of the Israel Mathematical Union and the German Mathematical Society

8-10 March 2021

2020
Apr
06

# [HUJI-BGU AGNT Seminar]

Repeats every week every Monday until Sun Jun 28 2020 except Mon Apr 06 2020.

2:15pm to 4:00pm2:15pm to 4:00pm

2:15pm to 4:00pm

2:15pm to 4:00pm

2:15pm to 4:00pm

2:15pm to 4:00pm

2:15pm to 4:00pm

2:15pm to 4:00pm

2:15pm to 4:00pm

2:15pm to 4:00pm

2:15pm to 4:00pm

2:15pm to 4:00pm

## Location:

https://zoom.us/j/468718180

2020
Apr
20

# Charlotte Chan [HUJI-BGU AGNT Seminar]

4:30pm to 5:30pm

## Location:

https://zoom.us/j/468718180

Join Zoom Meeting

https://zoom.us/j/468718180

Meeting ID: 468 718 180

Charlotte Chan (MIT)

Title: L-packets of S-unramified regular supercuspidal representations

https://zoom.us/j/468718180

Meeting ID: 468 718 180

Charlotte Chan (MIT)

Title: L-packets of S-unramified regular supercuspidal representations