BEGIN:VCALENDAR
PRODID:-//PSU Mathematics Department//Seminar iCalendar Generator//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Center for Dynamics and Geometry Colloquium
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
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END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150901T143000
DTEND;TZID=America/New_York:20150901T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27192
SUMMARY:Center for Dynamics and Geometry Colloquium - NO SEMINAR
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: NO
SEMINAR
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150908T143000
DTEND;TZID=America/New_York:20150908T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27193
SUMMARY:Center for Dynamics and Geometry Colloquium - Flexibility of entrop
ies and Lyapunov exponents for smooth dynamical systems. An overview of a
new program and first results.
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: Fl
exibility of entropies and Lyapunov exponents for smooth dynamical systems
. An overview of a new program and first results.\nSpeaker: Anatole Katok
\, The Pennsylvania State University\nAbstract: Entropies and Lyapunov cha
racteristic exponents for ``physical'' measures are essential numerical m
easures of exponential complexity of orbit behavior. With few exceptions t
hey cannot be precisely calculated. The flexibility program look for fin
ding general restrictions for those numbers and their interrelation that
are expected to be few\, and to showing that within those restrictions all
values can be attained. \n\nI will discuss non-trivial progress that
has been reached in two areas: Geodesic flows on surfaces (joint with Alen
a Erchenko) and area-preserving diffeomorphisms on three-dimensional mani
folds (joint with Jaime Bochi and federico Rodriguez Hertz). I will outli
ne general conjectures and mentioned some specific interesting problems.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150922T143000
DTEND;TZID=America/New_York:20150922T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27195
SUMMARY:Center for Dynamics and Geometry Colloquium - TBA
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: TB
A\nAbstract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150929T143000
DTEND;TZID=America/New_York:20150929T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27196
SUMMARY:Center for Dynamics and Geometry Colloquium - TBA
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: TB
A\nAbstract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20151006T143000
DTEND;TZID=America/New_York:20151006T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27197
SUMMARY:Center for Dynamics and Geometry Colloquium - TBA
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: TB
A\nAbstract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20151013T143000
DTEND;TZID=America/New_York:20151013T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27198
SUMMARY:Center for Dynamics and Geometry Colloquium - TBA
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: TB
A
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20151020T143000
DTEND;TZID=America/New_York:20151020T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27199
SUMMARY:Center for Dynamics and Geometry Colloquium - TBA
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: TB
A\nAbstract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20151027T143000
DTEND;TZID=America/New_York:20151027T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27200
SUMMARY:Center for Dynamics and Geometry Colloquium - TBA
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: TB
A\nAbstract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20151103T143000
DTEND;TZID=America/New_York:20151103T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27201
SUMMARY:Center for Dynamics and Geometry Colloquium - TBA
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: TB
A\nAbstract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20151110T143000
DTEND;TZID=America/New_York:20151110T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27202
SUMMARY:Center for Dynamics and Geometry Colloquium - The plaid model and o
uter billiards on kites
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: Th
e plaid model and outer billiards on kites\nSpeaker: Richard Schwartz\, Br
own University\nAbstract: I'll describe a combinatorial model which predic
ts\nthe combinatorial structure of a distinguished family of\nouter billia
rds orbits on kites. I call the model the plaid model\nbecause of its def
inition in terms of parallel families\nof straight lines. The plaid model
has a kind of hierarchical\nstructure which explains a lot of phenomena y
ou see for the\nouter billiards orbits\, such as unbounded orbits\, course
\nself-similarity\, and connections to the modular group.\nThe proof that
the plaid model works involves an orbit\nequivalence between two different
4-dimensionional piecewise\naffine maps of polytopes.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20151117T143000
DTEND;TZID=America/New_York:20151117T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27203
SUMMARY:Center for Dynamics and Geometry Colloquium - Simplicity of the Lya
punov spectrum via Boundary theory
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: Si
mplicity of the Lyapunov spectrum via Boundary theory\nSpeaker: Alex Furma
n\, University of Illinois at Chicago\nAbstract: Consider products of matr
ices in $G=SL(d\,R)$ that are chosen using\nsome ergodic dynamical system.
\nThe Multiplicative Ergodic Theorem (Oseledets) asserts that the\nasympto
tically such products behave as $\\exp(n\\Lambda)$ where $\\Lambda$\nis a
fixed diagonal traceless matrix\, called the Lyapunov spectrum of\nthe sys
tem.\nThe spectrum $\\Lambda$ depends on the system in a mysterious way\,
and\nis almost never known explicitly.\nThe best understood case is that o
f random walks\, where by the work of\nFurstenberg\, Guivarc'h-Raugi\, and
Gol'dsheid-Margulis we know that the\nspectrum is simple (i.e. all values
are distinct) provided the random\nwalk is not trapped in a proper algebr
aic subgroup.\nRecently\, Avila and Viana proved a conjecture of Kontsevic
h-Zorich\nthat asserts simplicity of the Lyapunov spectrum for another sys
tem\nrelated to the Teichmuller flow.\n\nIn the talk we shall describe an
approach to proving simplicity of the\nspectrum based on ideas from bounda
ry theory that were developed to\nprove rigidity of lattices. Based on joi
nt work with Uri Bader.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20151124T143000
DTEND;TZID=America/New_York:20151124T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27204
SUMMARY:Center for Dynamics and Geometry Colloquium - Thanksgiving break
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: Th
anksgiving break\nSpeaker: NO SEMINAR
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20151201T143000
DTEND;TZID=America/New_York:20151201T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27205
SUMMARY:Center for Dynamics and Geometry Colloquium - Non hyperbolic dynami
cs and non-hyperbolic measures.
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: No
n hyperbolic dynamics and non-hyperbolic measures.\nSpeaker: Christian Bon
atti\, University of Dijon\nAbstract: Hyperbolicity provides a simple unde
rstanding of chaotic dynamics. In some sense\, hyperbolic dynamics are t
he most complicated dynamics for which one can give a complete topological
description. An even more precise description of the dynamics of hyperbol
ic systems can be obtained through ergodic theory.\n\nHowever\, hyperbolic
systems are far from being all chaotic systems: there are numerous robust
ly non-hyperbolic systems.\n\nI will review several results and mechanisms
showing that the existence of non-hyperbolic measures can be robust. In f
act\, the robust existence of non hyperbolic measure may be the most commo
n situation in the non-hyperbolic world.\n\nI will review several results
and mechanisms showing that the existence of non-hyperbolic measures can b
e robust. In fact\, the robust existence of non hyperbolic measure may be
the most common situation in the non-hyperbolic world.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20151208T143000
DTEND;TZID=America/New_York:20151208T152900
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=27206
SUMMARY:Center for Dynamics and Geometry Colloquium - TBA
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: TB
A\nAbstract Link: http://
END:VEVENT
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