BEGIN:VCALENDAR
PRODID:-//PSU Mathematics Department//Seminar iCalendar Generator//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Geometry Luncheon Seminar
X-WR-TIMEZONE:America/New_York
BEGIN:VTIMEZONE
TZID:America/New_York
X-LIC-LOCATION:America/New_York
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:19700308T020000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:19701101T020000
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160113T120000
DTEND;TZID=America/New_York:20160113T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30564
SUMMARY:Geometry Luncheon Seminar - TBA
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160120T120000
DTEND;TZID=America/New_York:20160120T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30565
SUMMARY:Geometry Luncheon Seminar - Positive metric entropy arises between
some KAM tori
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: Positive metric entr
opy arises between some KAM tori\nSpeaker: Dong Chen\, PSU\nAbstract: The
celebrated KAM Theory says that if one makes a small perturbation of a non
-degenerate completely integrable system\, we still have a huge measure of
invariant tori with quasi-periodic dynamics in the perturbed system. Thes
e invariant tori are known as KAM tori. What happens between KAM tori draw
s lots of attention. In this talk I will present a Lagrangian perturbation
of the geodesic flow on a flat 3-torus. The perturbation is C^m small (m
can be arbitrarily large) but the flow has a positive measure of trajector
ies with positive Lyapunov exponent. The measure of this set is of course
extremely small. Still\, the flow has positive metric entropy. From this
result we get positive metric entropy between some KAM tori.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160127T120000
DTEND;TZID=America/New_York:20160127T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30566
SUMMARY:Geometry Luncheon Seminar - Classifying small quantum symmetries
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: Classifying small qu
antum symmetries\nSpeaker: Dave Penneys\, UCLA\nAbstract: The representati
on theory of subfactors generalizes the representation theory of quantum g
roups\, and thus we think of subfactors as objects which encode quantum sy
mmetries. In one sense\, subfactors of small index are the simplest exampl
es of subfactors\, and we have recently completed the classification of st
andard invariants to index 5+1/4. I will give a broad overview of the smal
l index subfactor classification program and the current state of the clas
sification.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160203T120000
DTEND;TZID=America/New_York:20160203T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30567
SUMMARY:Geometry Luncheon Seminar - TBA
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160210T120000
DTEND;TZID=America/New_York:20160210T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30568
SUMMARY:Geometry Luncheon Seminar - TBA
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160217T120000
DTEND;TZID=America/New_York:20160217T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30569
SUMMARY:Geometry Luncheon Seminar - TBA
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160224T120000
DTEND;TZID=America/New_York:20160224T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30570
SUMMARY:Geometry Luncheon Seminar - TBA
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160302T120000
DTEND;TZID=America/New_York:20160302T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30571
SUMMARY:Geometry Luncheon Seminar - TBA
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160309T120000
DTEND;TZID=America/New_York:20160309T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30572
SUMMARY:Geometry Luncheon Seminar - TBA
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160316T120000
DTEND;TZID=America/New_York:20160316T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30573
SUMMARY:Geometry Luncheon Seminar - TBA
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160323T120000
DTEND;TZID=America/New_York:20160323T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30574
SUMMARY:Geometry Luncheon Seminar - TBA
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160330T120000
DTEND;TZID=America/New_York:20160330T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30575
SUMMARY:Geometry Luncheon Seminar - TBA
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160406T120000
DTEND;TZID=America/New_York:20160406T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30576
SUMMARY:Geometry Luncheon Seminar - Proof of Schläfli formula using Integr
al Geometry.
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: Proof of Schläfli f
ormula using Integral Geometry.\nSpeaker: Elena Frenkel\, University of St
rasbourg\nAbstract: Abstract: Let $P_t$ be a family of compact convex poly
hedra of dimension $n\\geq2$ in Euclidean\, hyperbolic or spherical $n$-di
mensional space. The Schläfli formula\, discovered in 1850's by Schläfli
in case of spherical simplexes and extended to the hyperbolic case by Sfo
rza in 1907\, relates the variation of volume of $P_t$ to the volumes of i
ts $n-2$-faces and dihedral angles. References to more modern proofs of S
chläfli formula can be found in Milnor's note "The Schläfli differential
equality". In this talk we will give a different (short) proof of Schläf
li formula using Integral Geometry.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160413T120000
DTEND;TZID=America/New_York:20160413T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30577
SUMMARY:Geometry Luncheon Seminar - Discretization in PDEs and convolution
Laplacians on metric-measure spaces
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: Discretization in PD
Es and convolution Laplacians on metric-measure spaces\nSpeaker: Sergei Iv
anov\, Steklov Institute\, SPb\, visiting PennState\nAbstract: will speak
about approximation of eigenvalues of the Laplace-Belrami\noperator on a R
iemannian manifold with graph Laplacians of suitable\ngraphs. The construc
tion and some of the results can be generalized\nto a large class of metri
c-measure spaces. The results are joint work\nwith D.Burago and Y.Kurylev.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160420T120000
DTEND;TZID=America/New_York:20160420T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30578
SUMMARY:Geometry Luncheon Seminar - David-Semmes conjecture and reflectionl
ess measures.
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: David-Semmes conject
ure and reflectionless measures.\nSpeaker: Fedor Nazarov\, Kent Universit
y\nAbstract: We will discuss some partial progress towards a fascinating\n
(but still unresolved) conjecture in Geometric Measure Theory relating\nth
e boundedness of certain singular integral operators and the geometric\npr
operties of the underlying measure.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160427T120000
DTEND;TZID=America/New_York:20160427T133000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30579
SUMMARY:Geometry Luncheon Seminar - “Rigidity of product structure and bi
-Lipschitz homeomorphisms of Carnot groups”
DESCRIPTION:Seminar: Geometry Luncheon Seminar\nTitle: “Rigidity of produ
ct structure and bi-Lipschitz homeomorphisms of Carnot groups”\nSpeaker:
Bruce Kleiner\, Courant\, NYU\nAbstract: There are many contexts in mathe
matics where one has a mapping between products\, and one would like to kn
ow if the product structure must be respected by the map. For instance\, i
n geometric group theory one may ask when a quasi-isometry f : H_1 x H_2
—> G_1 x G_2 between products of groups must asymptotically look like
a product of quasi-isometries\, while in geometric mapping theory one may
ask when bi-Lipschitz (or quasiconformal) homeomorphisms f : X_1 x X_2 —
> Y_1 x Y_2 between products are necessarily product mappings. The focus
of the lecture will be on the case of nilpotent groups\, which turns out t
o have interesting variants even for mappings from R^n to itself.
END:VEVENT
END:VCALENDAR