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
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150113T143000
DTEND;TZID=America/New_York:20150113T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24807
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:20150120T143000
DTEND;TZID=America/New_York:20150120T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24809
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:20150127T143000
DTEND;TZID=America/New_York:20150127T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24811
SUMMARY:Center for Dynamics and Geometry Colloquium - Fourier dimension and
its modifications
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: Fo
urier dimension and its modifications\nSpeaker: Joerg Schmeling\, Lund Uni
versity\nAbstract: Fourier dimension has proved to be a useful tool to est
imate Hausdorff dimensions of subsets of $\\mathbb{R}^n$. It is also used
in metric number theory and harmonic analysis. However it is not really j
ustified to call it a dimension. We will investigate stability of the Four
ier dimension under unions of sets and give positive results as well as co
unterexamples. As an outcome of these studies we will propose a modificati
on of the Fourier dimension. This modification regularizes this notion in
several ways. First it behaves like a dimension. It also has an important
counterpart for measures. In particular we can show that the set of Borel
measures having a given Fourier dimension is determined by its joint zero
sets.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150203T143000
DTEND;TZID=America/New_York:20150203T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24813
SUMMARY:Center for Dynamics and Geometry Colloquium - Complex dynamics and
elliptic curves
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: Co
mplex dynamics and elliptic curves\nSpeaker: Laura DeMarco\, Northwestern
University\nAbstract: In this talk\, I will explain some connections betwe
en modern research in complex and arithmetic dynamics and the classical th
eory of elliptic curves and rational points.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150210T143000
DTEND;TZID=America/New_York:20150210T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24815
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:20150217T143000
DTEND;TZID=America/New_York:20150217T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24817
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:20150224T143000
DTEND;TZID=America/New_York:20150224T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24819
SUMMARY:Center for Dynamics and Geometry Colloquium - CANCELLED
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: CA
NCELLED
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150303T143000
DTEND;TZID=America/New_York:20150303T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24821
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:20150310T143000
DTEND;TZID=America/New_York:20150310T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24823
SUMMARY:Center for Dynamics and Geometry Colloquium - NO SEMINAR: Spring br
eak
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: NO
SEMINAR: Spring break
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150317T143000
DTEND;TZID=America/New_York:20150317T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24825
SUMMARY:Center for Dynamics and Geometry Colloquium - Entropy for generaliz
ed beta-transformations
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: En
tropy for generalized beta-transformations\nSpeaker: Dan Thompson\, Ohio S
tate University\nAbstract: Generalized beta-transformations are the class
of piecewise continuous interval maps given by taking the beta-transformat
ion x↦βx (mod1)\, where β > 1\, and replacing some of the branches wit
h branches of constant negative slope. We would like to describe the set o
f beta for which these maps can admit a Markov partition. We know that bet
a (which is the exponential of the entropy of the map) must be an algebrai
c number. Our main result is that the Galois conjugates of such beta have
modulus less than 2. This extends an analysis of Solomyak for the case of
beta-transformations\, who obtained a sharp bound of the golden mean in th
at setting.\n\nI will also describe a connection with some of the results
of Thurston's fascinating final paper\, where the Galois conjugates of ent
ropies of post-critically finite unimodal maps are shown to describe a bea
utiful fractal. The talk will be suitable for a general dynamics audience
\, and for graduate students.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150331T143000
DTEND;TZID=America/New_York:20150331T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24829
SUMMARY:Center for Dynamics and Geometry Colloquium - Deformations of bound
ary distances and geodesic flows
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: De
formations of boundary distances and geodesic flows\nSpeaker: Sergei Ivano
v\, Russian Academy of Sciences\, St. Petersburg\nAbstract: This is a join
t work with Dima Burago. We show that a simple Finsler metric\non the n-di
sc can be deformed so as to induce an arbitrary perturbation\nof the bound
ary distance function\, or an arbitrary symplectic perturbation\nof the ge
odesic scattering map. Among the applications is a construction\nof a met
ric on the 4-sphere arbitrarily close to the standard "round" metric\nand
having positive metric entropy of its geodesic flow (which is regarded as
\na Hamiltonian flow).
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150407T143000
DTEND;TZID=America/New_York:20150407T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24831
SUMMARY:Center for Dynamics and Geometry Colloquium - Beyond the obstructio
ns of KAM theory
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: Be
yond the obstructions of KAM theory\nSpeaker: Raphael Krikorian\, Univers
ity of Paris VI\nAbstract: KAM theory is a very powerful and useful tool i
n Analysis and Dynamical Systems. It is a far reaching generalization of
the classical fixed point theorem. In Dynamical Systems it originates from
the works of Kolmogorov\, Arnold and Moser and in Analysis from the works
of Nash and Moser. Though KAM theory is a very versatile paradigm\, its
scope of application is limited by three classical obstructions: it is pe
rturbative\, it requires to deal with small denominators and as a conseque
nce to exclude some parameters from the analysis of the problem under stud
y. I will try to describe some cases where these obstructions can be remov
ed.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150414T143000
DTEND;TZID=America/New_York:20150414T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24833
SUMMARY:Center for Dynamics and Geometry Colloquium - Stochastic Arnold dif
fusion.
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: St
ochastic Arnold diffusion.\nSpeaker: Vadim Kaloshin\, University of Maryla
nd\, College Park\nAbstract: In 1964 V. Arnold constructed an example of n
early integrable deterministic system \nexhibiting instabilities. In the 1
970s physicist B. Chirikov coined the term for this phenomenon \n``Arnold
diffusion''\, where diffusion refers to stochastic nature of instability.
One of most famous \nexample of stochastic instabilities for nearly integ
rable systems is dynamics of Asteroids in \nKirkwood gaps in the Asteroid
belt. They were discovered numerically by astronomer J. Wisdom. \n During
the talk we describe a class of nearly integrable deterministic systems\,
where \nwe prove stochastic diffusive behavior. Namely\, we show that dis
tributions given by deterministic \nevolution of certain random initial co
nditions weakly converge to a diffusion process. This result \nis conceptu
ally different from all known mathematical results\, where existence of a
``diffusing orbit’' \nis shown. This work is based on three papers: one
is joint with O. Castejon\, another is joint \nwith M. Guardia and J. Zhan
g\, and the third one is joint with J. Zhang and K. Zhang.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150421T143000
DTEND;TZID=America/New_York:20150421T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24835
SUMMARY:Center for Dynamics and Geometry Colloquium - NO SEMINAR\, Maryland
conference
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: NO
SEMINAR\, Maryland conference
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20150428T143000
DTEND;TZID=America/New_York:20150428T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24837
SUMMARY:Center for Dynamics and Geometry Colloquium - TBA
DESCRIPTION:Seminar: Center for Dynamics and Geometry Colloquium\nTitle: TB
A
END:VEVENT
END:VCALENDAR