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TZID:Asia/Jerusalem
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DTSTART:20181028T020000
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DTSTART:20180323T020000
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UID:calendar.57072.field_date.0@mathematics.huji.ac.il
DTSTAMP:20180621T161124Z
CREATED:20180506T153416Z
DESCRIPTION:Date: \n\n(All day)\n\n\n\n\n\nSee also: Named Lecture Series\,
Conferences & special events\, Upcoming Conferences and Special EventsLoc
ation: \n\nManchester House\, Lecture Hall 2\n\n\n\n\n\n The Amitsur Memori
al Symposium is an annual conference in memory of Prof. Shimshon Avraham A
mitsur. It is hosted by a different institution each year.\n\n\n\n\n\n The
25th Amitsur Memorial Symposium will be held at the Einstein Institute of
Mathematics\, the Hebrew University of Jerusalem.\n\n\n\n Speakers\, titles
and abstracts\n\n\n\n\n\n Yael Algom-KfirTitle: The completion of a non-sy
mmetric metric space\n\n\n\n\n\n Amiram BraunTitle: The polynomial question
in modular invariant theory\, old and new.Abstract: Let G be a finite gro
up\, V a finite dimensional G- module over a field F\, and S(V) the symme
tric algebra of V. The above problem seeks to determine when is the ring o
f invariants S(V)^G \, a polynomial ring. In the non-modular case (i.e.
char(F) being prime to order(G))\, this was settled in the Shephard-Todd-
Chevalley theorem. The modular case (i.e. char(F) divides order (G) )\, i
s still wide open. I shall discuss some older results due to Serre\, Naka
jima \, Kemper-Malle and explain some new results\, mostly in dimension 3
.\n\n\n\n\n\n Tsachik GelanderTitle: Local rigidity of uniform latticesAbst
ract. We establish topological local rigidity for uniform lattices in comp
actly generated groups\, extending the result of Weil from the realm of Li
e groups. We generalize the classical local rigidity theorem of Selberg\,
Calabi and Weil to irreducible uniform lattices in Isom(X) where X is a pr
oper CAT(0) space with no Euclidian factors\, not isometric to the hyperbo
lic plane. We deduce an analog of Wang’s finiteness theorem for certain no
n-positively curved metric spaces.This is a joint work with Arie Levit.\n
\n\n\n\n\n Lev GlebskyTitle: Approximations of groups by finite and linear
groups.Abstract: The sofic groups and hyperlinear groups are groups approx
imable by finite symmetricand by unitary groups\, respectively. I recall t
heir definitions and discuss why those classes of groupsare interesting. T
hen I consider approximations by other classes of groups and review some r
esults\,including rather recent ones by N. Nikolov\, J. Schneider\, A.Tho
m\, https://arxiv.org/abs/1703.06092 .If time permits I'll speak about sta
bility and its relations with approximability.\n\n\n\n\n\n Arye JuhaszTitle
: On the center of Artin groups.Abstract: Let A be an Artin group. It is
known that if A is spherical (of finite type) and irreducible (not a d
irect sum)\, then it has infinite cyclic center.It is conjectured that al
l other irreducible Artin groups have trivial center. I prove this conjec
ture under a stronger assumption that not being spherical namely\, if ther
e is a standard generator which is not contained in any 3-generated spheri
cal standard parabolic subgroup. The main tool is relative presentation
s of Artin groups.\n\n\n\n\n\n Alex Lubotzky Title: First order rigidity o
f high-rank arithmetic groups Abstract: The family of high rank arithmeti
c groups is a class of groups playing an important role in various areas o
f mathematics. It includes SL(n\,Z)\, for n>2 \, SL(n\, Z[1/p] ) for
n>1\, their finite index subgroups and many more. A number of remarkable
results about them have been proven including\; Mostow rigidity\, Margulis
Super rigidity and the Quasi-isometric rigidity. We will talk about a ne
w type of rigidity : 'first order rigidity'. Namely if G is such a non
-uniform characteristic zero arithmetic group and H a finitely generated
group which is elementary equivalent to it then H is isomorphic to G. Th
is stands in contrast with Zlil Sela's seminal work which implies that th
e free groups\, surface groups and hyperbolic groups (many of which are l
ow-rank arithmetic groups) have many non isomorphic finitely generated gr
oups which are elementary equivalent to them.Joint work with Nir Avni and
Chen Meiri. \n\n\n\n\n\n Chloe PerinTitle: Forking independence in the free
groupAbstract: Model theorists define\, in structures whose first-order t
heory is 'stable' (i.e. suitably nice)\, a notion of independence between
elements. This notion coincides for example with linear independence when
the structure considered is a vector space\, and with algebraic independen
ce when it is an algebraically closed field. Sela showed that the theory
of the free group is stable. In a joint work with Rizos Sklinos\, we give
an interpretation of this model theoretic notion of independence in the fr
ee group using Grushko and JSJ decompositions.\n\n\n\n\n\n Elyiahu RipsTitl
e: Free Engel groupsAbstract: A free n-Engel group is the relatively free
group of the variety of groups with the identical relation [x\, y\, y\,..
.\,y (n times)]=1. Let n>=20. We show that the free Engel group on at leas
t two generators is not locally nilpotent. Our approach to Engel groups co
mbinesgeometric and combinatorial methods. On the geometric side\, we cons
ider graded van Kampen diagrams\, and we prove that they display (discrete
) negative curvature properties. To do this\, we construct a canonical for
m of elements in each consecutive rank (this is the combinatorial aspect).
Using the canonical form\, we obtain 'parallel meetings' between the reg
ions of higher ranks of the graded van Kampen diagram and\, using surgery\
, improve it to direct meeting. The combinatorial structure of the relator
s secures that this direct meeting is (relatively) short. Given the struct
ure of graded van Kampen diagrams\, we deduce a graded version of Greendli
nger's Lemma and then establish the properties of the group.Joint work wit
h Arye Juhasz\n\n\n\n\n\n Malka SchapsTitle: Symmetric Kashivara crystals o
f type A in low rankAbstract: The basis of elements of the highest weight
representations of affine Lie algebra of type A can be labeled in three d
ifferent ways\, my multipartitions\, by piecewise linear paths in the weig
ht space\, and by canonical basis elements. The entire infinite basis is
recursively generated from the highest weight vector of operators f_i fro
m the Chevalley basis of the affine Lie algebra\, and organized into a cry
stal called a Kashiwara crystal. We describe cases where one can move bet
ween the different labelings in a non-recursive fashion\, particularly whe
n the crystal has some symmetry.Joint work with Ola Amara-Omari\n\n\n\n\n
\n Aner ShalevTitle: The length and depth of finite groups\, algebraic grou
ps and Lie groupsAbstract: The length of a finite group G is defined to be
the maximal length of an unrefinable chain of subgroups going from G to 1
. This notion was studied by many authors since the 1940s.Recently there i
s growing interest also in the depth of G\, which is the minimal length of
such a chain. Moreover\, similar notions were defined and studied for imp
ortant families of infinite groups\, such as connected algebraic groups an
d connected Lie groups.I will describe recent works on these topics\, join
t with Tim Burness and Martin Liebeck. The proofs usea variety of tools\,
including recent results in analytic number theory.\n\n\n\n\n\n \n\n\n\n Pr
ogramme\n\n\n\n\n\n Tuesday\, June 26th:\n\n\n\n\n\n 9:30 -- Gathering\n\n\n
\n\n\n 10:00 -- Lubotzky\n\n\n\n\n\n 11:00 -- Coffee break\n\n\n\n\n\n 11:30
-- Schaps\n\n\n\n\n\n 12:30 -- Lunch break\n\n\n\n\n\n 14:00 -- Juhasz\n\n\n
\n\n\n 15:00 -- Shalev\n\n\n\n\n\n 16:00 -- Coffee break\n\n\n\n\n\n 16:30 --
Glebsky\n\n\n\n\n\n The symposium dinner will be held in the evening\, the
exact time and location will be announced later.The dinner will be attend
ed by Amitsur's children.\n\n\n\n\n\n Wednesday\, June 27th:\n\n\n\n\n\n 10:
00 -- Rips\n\n\n\n\n\n 11:00 -- Coffee break\n\n\n\n\n\n 11:30 -- Braun\n\n
\n\n\n\n 12:30 -- Lunch break\n\n\n\n\n\n 14:00 -- Perin\n\n\n\n\n\n 15:00 --
Gelander\n\n\n\n\n\n 16:00 -- Coffee break\n\n\n\n\n\n 16:30 -- Algom-Kfir.
\n\n\n\n amitsurposter2018.pdf559 KB \n\n\n\n\n Export\n \n\n \nsubscri
be iCal
DTSTART;VALUE=DATE:20180626
DTEND;VALUE=DATE:20180628
LAST-MODIFIED:20180620T075520Z
SUMMARY:Amitsur Memorial Symposium 2018
URL;TYPE=URI:https://mathematics.huji.ac.il/event/amitsur-memorial-symposiu
m
END:VEVENT
BEGIN:VEVENT
UID:calendar.52625.field_date.0@mathematics.huji.ac.il
DTSTAMP:20180621T161124Z
CREATED:20180213T061407Z
DESCRIPTION:Date: \n\nMon\, 03/09/2018 (All day) to Fri\, 07/09/2018 (All
day)\n\n\n\n\nSee also: Conferences & special events\, Upcoming Conferenc
es and Special EventsLocation: \n\nThe Mathematical Institute\, Oxford\n\n
\n\n\n\n More information here.\n\n\n\n\n\n \n\n\n\n Export\n \n\n \nsub
scribe iCal
DTSTART;VALUE=DATE:20180903
DTEND;VALUE=DATE:20180908
LAST-MODIFIED:20180213T070500Z
SUMMARY:Groups\, Geometry and Representations @ Oxford: Celebrating Dan Se
gal and Aner Shalev
URL;TYPE=URI:https://mathematics.huji.ac.il/event/groups-geometry-and-repre
sentations-mathematical-institute-oxford-celebrating-dan-segal
END:VEVENT
BEGIN:VEVENT
UID:calendar.53898.field_date.0@mathematics.huji.ac.il
DTSTAMP:20180621T161124Z
CREATED:20180311T091803Z
DESCRIPTION:Date: \n\nTue\, 02/10/2018 (All day) to Thu\, 11/10/2018 (All
day)\n\n\n\n\nSee also: Conferences & special events\, Upcoming Conferenc
es and Special EventsLocation: \n\nThe Einstein Institute of Mathemtics\,
Jerusalem\n\n\n\n (with support from École Polytechnique and Freie Universi
tät Berlin)\n\n\n\n October 2nd - 11th 2018\n\n\n\n\n Description\n\n\n\n The
Einstein Institute of Mathematics will host a 10 day undergraduate worksh
op\, bringing together outstanding (2nd and 3rd year) undergraduate studen
ts from Israel and abroad.The workshop will be centered around two seminar
-style courses\, each one consisting of talks given by the students themse
lves and moderated by a faculty member from the institute.This year the to
pics are: \n\n \n Topics in the Theory of Zeta and L-Functions (moderated b
y Jasmin Matz). \n \n \n Description: The Riemann zeta function is the protot
ypical example of a large zoo of ζ- and L-function. Such functions are of
central interests in modern number theory. In this seminar we are going to
study several examples with an emphasis on analytical and spectral aspect
s. \n \n Polytopes (moderated by Eran Nevo). \n \n \n Description: Polytopes h
ave fascinated humans since antiquity and are related to many areas of mod
ern mathematics. We will study polytopes\, focusing on connections between
their geometric and combinatorial properties. \n \n In addition\, there wil
l be minicourses by Klaus Altmann (FU Berlin) and Jake Solomon (HUJI)\, gu
est lectures\, and a social program.More information regarding the program
will be posted here\, as it becomes available.Check out the workshop's po
sters in English and Hebrew!\n \n \n\n Location and Dates\n\n\n\n The workshop
will take place at the Einstein Institute of Mathematics \, the Hebrew
University of Jerusalem \, Jerusalem\, Israel.Participants are expected to
arrive the day before\, on Sunday\, October 1st\, and the workshop will e
nd on Thursday\, October 11th in the afternoon. \n \n\n Applications \n\n\n
\n To apply please send an email to huji.math.undergrad.workshop@gmail.com
with the following information: \n\n \n Your name\, gender\, address\, and
institution. \n \n \n A grade transcript with a clear listing of the courses
you've taken so far in your mathematical studies (an informal transcript i
s OK). \n \n \n The name of a contact person from whom we may request a recom
mendation letter if needed. \n \n An application with only partial informati
on (for example\, if you don't have a contact person who'll write you a le
tter)\, is better than no application at all!Applications received by Frid
ay\, June 15th\, 2018\, will receive full consideration. \n \n\n Financial S
upport\, Lodging\, Etc. \n\n\n\n Partial support towards travel is availabl
e.Shared lodging (two in a room) at the Bretter House\, as well as breakf
ast and lunch will be provided for accepted participants.For inquiries ple
ase email huji.math.undergrad.workshop@gmail.com \n \n\n\n Export\n \n\n
\nsubscribe iCal
DTSTART;VALUE=DATE:20181002
DTEND;VALUE=DATE:20181012
LAST-MODIFIED:20180505T145622Z
SUMMARY:The Einstein Institute International Undergraduate Workshop
URL;TYPE=URI:https://mathematics.huji.ac.il/event/einstein-institute-intern
ational-undergraduate-workshop
END:VEVENT
BEGIN:VEVENT
UID:calendar.57071.field_date.0@mathematics.huji.ac.il
DTSTAMP:20180621T161124Z
CREATED:20180506T152218Z
DESCRIPTION:Date: \n\nSun\, 07/10/2018 (All day) to Thu\, 11/10/2018 (All
day)\n\n\n\n\nSee also: Conferences & special events\, Upcoming Conferenc
es and Special EventsLocation: \n\nIsrael Institute for Advanced Studies\,
The Hebrew University of Jerusalem\n\n\n\n\n\n In this workshop we intend
to explore which methods and results can be extended from the realm of gro
ups to stationary random graphs. In doing so we hope to gain better unders
tanding of the factors that determine each random walk behavior\, both on
stationary random graphs and on Cayley graphs.\n\n\n\n\n\n More information
\n\n\n\n Export\n \n\n \nsubscribe iCal
DTSTART;VALUE=DATE:20181007
DTEND;VALUE=DATE:20181012
LAST-MODIFIED:20180530T084742Z
SUMMARY:Random Walks on Groups and Stationary Random Graphs
URL;TYPE=URI:https://mathematics.huji.ac.il/event/random-walks-groups-and-s
tationary-random-graphs
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