BEGIN:VCALENDAR
PRODID:-//PSU Mathematics Department//Seminar iCalendar Generator//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Dynamical systems 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:20160111T153500
DTEND;TZID=America/New_York:20160111T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30058
SUMMARY:Dynamical systems seminar - First day of classes
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: First day of classes
\nSpeaker: NO SEMINAR
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160118T153500
DTEND;TZID=America/New_York:20160118T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30059
SUMMARY:Dynamical systems seminar - Techniques and concepts of amenability
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: Techniques and conce
pts of amenability\nSpeaker: Kate Juschenko\, Northwestern University\nAbs
tract: The subject of amenability essentially begins in 1900's with Lebesg
ue. He asked whether the properties of his integral are really fundamental
and follow from more familiar integral axioms. This led to the study of
positive\, finitely additive and translation invariant measure on reals as
well as on other spaces. In particular the study of isometry-invariant me
asure led to the Banach-Tarski decomposition theorem in 1924. The class of
amenable groups was introduced by von Neumann in 1929\, who explained wh
y the paradox appeared only in dimensions greater or equal to three\, and
does not happen when we would like to decompose the two-dimensional ball.
In 1940's\, M. Day defined a class of elementary amenable groups as the la
rgest class of groups amenability of which was known to von Naumann. He as
ked whether there are other groups then that. We will give an introductory
to amenability talk\, and explain more recent developments in this field.
In particular\, I will explain how to obtain all known non-elementary ame
nable groups using only one approach.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160125T153500
DTEND;TZID=America/New_York:20160125T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30060
SUMMARY:Dynamical systems seminar - Ergodicity and partial hyperbolicity on
unit tangent bundles of surfaces
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: Ergodicity and parti
al hyperbolicity on unit tangent bundles of surfaces\nSpeaker: Raúl Ures
\, Universidad de la República Uruguay
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160201T153500
DTEND;TZID=America/New_York:20160201T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30061
SUMMARY:Dynamical systems seminar - TBA
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: TBA\nSpeaker: NO SEM
INAR
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160208T153500
DTEND;TZID=America/New_York:20160208T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30062
SUMMARY:Dynamical systems seminar - Exponential Decays and Topological Entr
opy
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: Exponential Decays a
nd Topological Entropy\nSpeaker: Peng Sun\, Central University of finance
and Economics\, Beijing\, China\nAbstract: We study exponential decays of
Lebesgue numbers and expansive constants under dynamics. We find some inte
resting properties\, especially their relations with topological entropy.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160215T153500
DTEND;TZID=America/New_York:20160215T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30063
SUMMARY:Dynamical systems seminar - Postive loops - on a question by Eliash
berg-Polterovich and a contact systolic inequality
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: Postive loops - on a
question by Eliashberg-Polterovich and a contact systolic inequality\nSpe
aker: Peter Albers\, University of Muenster\, Germany\nAbstract: In 2000 E
liashberg-Polterovich introduced the concept of positivity in contact geom
etry. The notion of a positive loop of contactomorphisms is central. A que
stion of Eliashberg-Polterovich ist whether C^0-small positive loops exist
. We give a negative answer to this question. Moreover we give sharp lower
bounds for the size which\, in turn\, gives rise to a L^\\infty-contact s
ystolic inequality. This should be contrasted with a recent result by Abbo
ndandolo et. al. that on the standard contact 3-sphere no L^2-contact syst
olic inequality exists. The choice of L^2 is motivated by systolic inequal
ities in Riemannian geometry. This is joint work with U. Fuchs and W. Merr
y.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160222T153500
DTEND;TZID=America/New_York:20160222T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30064
SUMMARY:Dynamical systems seminar - TBA
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160229T153500
DTEND;TZID=America/New_York:20160229T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30065
SUMMARY:Dynamical systems seminar - TBA
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160307T153500
DTEND;TZID=America/New_York:20160307T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30066
SUMMARY:Dynamical systems seminar - Spring break
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: Spring break\nSpeake
r: NO SEMINAR
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160314T153500
DTEND;TZID=America/New_York:20160314T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30067
SUMMARY:Dynamical systems seminar - TBA
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: TBA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160328T153500
DTEND;TZID=America/New_York:20160328T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30069
SUMMARY:Dynamical systems seminar - Entropy Rigidity in Riemannian and Hilb
ert geometries
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: Entropy Rigidity in
Riemannian and Hilbert geometries\nSpeaker: Thomas Barthelmé\, Penn State
\nAbstract: I will talk about an entropy rigidity result for compact Riema
nnian manifolds\, less famous then BCG\, of Ledrappier and Wang and a gene
ralization of it to finite volume (joint work with Ludovic Marquis and And
rew Zimmer).\n\nThe great advantage of the Ledrappier-Wang result is that
it does not assume that the metric is negatively curved. I will try to pre
sent some of the ingredients of the proof (which involve building the Patt
erson-Sullivan measure in general and getting an integral formula linking
that measure to the volume entropy).\n\nIf time permit\, I will also expla
in how one can use that result (with others) to get an entropy rigidity r
esult in Hlbert geometry.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160404T153500
DTEND;TZID=America/New_York:20160404T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30079
SUMMARY:Dynamical systems seminar - TBA
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160411T153500
DTEND;TZID=America/New_York:20160411T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30078
SUMMARY:Dynamical systems seminar - Differentiable Linearization Theorems
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: Differentiable Linea
rization Theorems\nSpeaker: Sheldon Newhouse\, Michigan State University\n
Abstract: This will be a survey of linearization theorems in Dynamical Sys
tems. Emphasis will be on old and new results and applications to various
problems.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160418T153500
DTEND;TZID=America/New_York:20160418T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30077
SUMMARY:Dynamical systems seminar - TBA
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: TBA\nAbstract Link:
http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160425T153500
DTEND;TZID=America/New_York:20160425T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30076
SUMMARY:Dynamical systems seminar - Generic thinness and freeness in subgro
up of SL_n(Z)
DESCRIPTION:Seminar: Dynamical systems seminar\nTitle: Generic thinness and
freeness in subgroup of SL_n(Z)\nSpeaker: Elena Fuchs\, University of Ill
inois at Urbana-Champaign\nAbstract: Since the recent progress in expansio
n in linear groups\, thin groups\, or groups that are infinite index in th
eir Zariski closure\, have become objects of great interest in the context
of number theory. In this talk\, we delve into the question of whether or
not finitely generated subgroups are generically thin or not\, where gene
ricity is defined in a Euclidean model. The answer is yes\, if the model
is chosen appropriately. This is joint work with Igor Rivin.
END:VEVENT
END:VCALENDAR