2015
Mar
18

# Eshnav: Jake Solomon - "Gromov's non-squeezing theorem"

## Lecturer:

Jake Solomon

6:00pm to 7:00pm

## Location:

Math 2 (Manchester building)

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2015
Mar
18

Jake Solomon

6:00pm to 7:00pm

Math 2 (Manchester building)

2018
Jan
21

3:00pm to 4:00pm

Room 70A, Ross Building, Jerusalem, Israel

The Birch and Swinnerton-Dyer conjecture predicts that the group of rational points on an elliptic curve E over Q has rank equal to the order of vanishing of the L-function of E. Generalisations of this conjecture to motives M were formulated by Belinson and Bloch-Kato. I will explain a proof of a version of the Bloch-Kato conjecture in p-adic coefficients, when M is attached to a p-ordinary Hilbert modular form of any weight and the order of vanishing is 1.

2015
Apr
15

Mike Hochman

6:00pm to 7:00pm

Math 2 (Manchester building)

2015
May
11

Prof. Tsachik Gelander (Weizmann)

6:00pm to 7:00pm

Math 2 (Manchester building)

2015
Jun
01

Prof. Itai Benjamini (Weizmann)

6:00pm to 7:00pm

Math 2 (Manchester building)

2016
May
18

Emmanuel Farjoun

6:00pm to 7:00pm

Math 2 (Manchester building)

2017
Mar
22

Aner Shalev

6:00pm to 7:00pm

Math 2 (Manchester building)

2017
Apr
26

Nati Linial

6:00pm to 7:00pm

Math 2 (Manchester building)

2017
Jun
07

Dr. Oded Margalit (IBM Research, Be'er Sheva)

6:00pm to 7:00pm

Math 2 (Manchester building)

2017
Jun
21

Noam Berger

6:00pm to 7:00pm

Math 2 (Manchester building)

2017
Nov
15

Tomer Schlank

6:00pm to 7:00pm

Math 2 (Manchester building)

2017
Mar
02

2017
Nov
02

10:30am to 11:30am

hyperbolic groups and amenability

(joint work with Françoise Dal'Bo and Andrea Sambusetti)

Given a finitely generated group G acting properly on a metric space X,

the exponential growth rate of G with respect to X measures "how big"

the orbits of G are. If H is a subgroup of G, its exponential growth

rate is bounded above by the one of G. In this work we are interested in

the following question: what can we say if H and G have the same

exponential growth rate? This problem has both a combinatorial and a

geometric origin. For the combinatorial part, Grigorchuck and Cohen

Given a finitely generated group G acting properly on a metric space X,

the exponential growth rate of G with respect to X measures "how big"

the orbits of G are. If H is a subgroup of G, its exponential growth

rate is bounded above by the one of G. In this work we are interested in

the following question: what can we say if H and G have the same

exponential growth rate? This problem has both a combinatorial and a

geometric origin. For the combinatorial part, Grigorchuck and Cohen

2017
Apr
27

10:30am to 11:30am

Ross 70

Abstract: A permutation representation of a group G is called highly transitive if it is transitive on k-tuples of points for every k. Until just a few years ago groups admitting such permutation representations were thought of as rare. I will focus on three rather recent papers: G-Garion, Hall-Osin, Gelander-G-Meiri (in preparation) showing that such groups are in fact very common.

2018
May
10

10:30am to 11:30am

Ross 70

The Littlewood conjecture is an open problem in simultaneous Diophantine approximation of two real numbers. Similar problem in a field K of formal series over finite fields is also still open. This positive characteristic version of problem is equivalent to whether there is a certain bounded orbit of diagonal semigroup action on Bruhat-Tits building of PGL(3,K).