BEGIN:VCALENDAR
PRODID:-//PSU Mathematics Department//Seminar iCalendar Generator//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Department of Mathematics 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
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TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:19701101T020000
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160114T153500
DTEND;TZID=America/New_York:20160114T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30195
SUMMARY:Department of Mathematics Colloquium - Random walk parameters and t
he geometry of groups
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: Random wa
lk parameters and the geometry of groups\nSpeaker: Tianyi Zheng\, Stanford
University\nAbstract: The first characterization of groups by an asymptot
ic description of random walks on their Cayley graphs dates back to Kesten
’s criterion of amenability. I will first review some connections betwee
n the random walk parameters and the geometry of the underlying groups. I
will then discuss a flexible construction that gives solution to the inver
se problem (given a function\, find a corresponding group) for large class
es of speed\, entropy and return probability and Hilbert compression funct
ions of groups of exponential volume growth. Based on joint work with Jere
mie Brieussel.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160121T153500
DTEND;TZID=America/New_York:20160121T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30196
SUMMARY:Department of Mathematics Colloquium - Topics in Stochastic Analysi
s
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: Topics in
Stochastic Analysis\nSpeaker: Fabrice Baudoin\, Perdue University\nAbstra
ct: Abstract: Starting from basic principles we will present some recent d
evelopments in the theory of rough paths and in the theory of sub-Riemanni
an diffusions. The first part of the talk will be devoted to the theory of
rough paths. This theory was developed in the 1990’s by T. Lyons and al
lows to give a sense to solutions of differential equations driven by irre
gular paths. The theory itself has nothing to do with probability theory b
ut has had a tremendous impact on several recent developments in stochasti
c analysis and served as an inspiration to Hairer’s regularity structure
theory\, for which he was awarded the Fields medal in 2014. In the second
part of the talk\, we will address several problems in the geometric anal
ysis of some sub-Riemannian manifolds\, which can surprisingly solved usin
g diffusion semigroups techniques.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160128T153500
DTEND;TZID=America/New_York:20160128T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30197
SUMMARY:Department of Mathematics Colloquium - Superintegrability and exact
ly solvable problems in classical and quantum mechanics
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: Superinte
grability and exactly solvable problems in classical and quantum mechanics
\nSpeaker: Willard Miller\, Jr.\, University of Minnesota\nAbstract: Quant
um superintegrable systems are systems with maximum symmetry\, which\nperm
its their explicit solvability. Integrable systems in n dimensional spac
e are defined by n mutually commuting symmetry operators. Superintegrable
systems admit 2n-1 symmetry operators which cannot all mutually commute.
The symmetries generate closed algebraic structures\, usually not Lie alge
bras\, The irreducible representations of these algebras yield important
information about the eigenvalues and eigenspaces of the quantum systems.
Distinct superintegrable systems and their symmetry algebras are related
by geometric contractions which have important physical and geometric impl
ications\, such as the Askey scheme for obtaining all hypergeometric ortho
gonal polynomials as limits of Racah/Wilson polynomials. We introduce the
subject and and survey the theory behind the discovery and classification
of these remarkable systems.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160204T153500
DTEND;TZID=America/New_York:20160204T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30198
SUMMARY:Department of Mathematics Colloquium - Free Boundary Problems Arisi
ng in Biology
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: Free Boun
dary Problems Arising in Biology\nSpeaker: Professor Avner Friedman\, Ohio
State University\nAbstract: In a free boundary problem one seeks to solve
a system of PDEs in a domain G whose boundary\, or a part of it\, is unkn
own\, and to also determine the free boundary. Classical free boundary pro
blems include contact problems in elasticity\, melting of ice\, propagatio
n of jets\, and cavitational flows. In recent years new free boundary prob
lems arose in the context of biological or biomedical processes. Examples
include the healing of a wound\, the growth of a tumor\, the formation of
a plaque in the artery\, the development of granulomas in tuberculosis\, a
nd biofilms. In this talk I will introduce some of the biological free bou
ndary problems\, focus on rigorous mathematical results\, and describe som
e open problems.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160211T153500
DTEND;TZID=America/New_York:20160211T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30199
SUMMARY:Department of Mathematics Colloquium - First-passage percolation
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: First-pas
sage percolation\nSpeaker: Arjun Krishnan\, University of Utah\nAbstract:
First-passage percolation is a random growth model on the cubic lattice Z^
d. It models\, for example\, the spread of fluid in a random porous medium
. This talk is about the asymptotic behavior of the first-passage time T(x
)\, which represents the time it takes for a fluid particle released at th
e origin to reach a point x on the lattice. \n\nThe first-order asymptotic
--- the law of large numbers --- for T(x) as x goes to infinity in a part
icular direction u\, is given by a deterministic function of u called the
time-constant. The first part of the talk will focus on a new variational
formula for the time-constant\, which results from a connection between fi
rst-passage percolation and stochastic homogenization for discrete Hamilto
n-Jacobi-Bellman equations. \n\nThe second-order asymptotic of the first-p
assage time describes its fluctuations\; i.e.\, the analog of the central
limit theorem for T(x). In two dimensions\, the fluctuations are (conjectu
red to be) in the Kardar-Parisi-Zhang (KPZ) or random matrix universality
class. We will present some new results (with J. Quastel) in the direction
of the KPZ universality conjecture. \n\nThe analysis of this problem will
involve tools and ideas from probability\, PDEs\, and ergodic theory.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160218T153500
DTEND;TZID=America/New_York:20160218T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30200
SUMMARY:Department of Mathematics Colloquium - Positivity in contact geomet
ry
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: Positivit
y in contact geometry\nSpeaker: Peter Albers\, University of Muenster\, Ge
rmany\nAbstract: The notion of positivity in contact geometry was introduc
ed in 2000 by Eliashberg and Polterovich. For example\, geodesic flows (an
d more generally Reeb flows) are positive. This and other examples will be
explained during the talk. Positivity has connections to many phenomena s
uch as contact (non-)squeezing and biinvariant partial orders. Positivity
leads to a generalization of the classical Bott-Samelson theorem and has c
onnection to the famous Weinstein conjecture. Examples will be presented t
hroughout the talk.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160225T153500
DTEND;TZID=America/New_York:20160225T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30201
SUMMARY:Department of Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: TBA\nSpea
ker: Fei Lu\, University of California\, Berkeley
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160303T153500
DTEND;TZID=America/New_York:20160303T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30202
SUMMARY:Department of Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: TBA\nSpea
ker: Wenrui Hao
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160310T153500
DTEND;TZID=America/New_York:20160310T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30203
SUMMARY:Department of Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: TBA\nAbst
ract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160324T153500
DTEND;TZID=America/New_York:20160324T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30205
SUMMARY:Department of Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: TBA\nSpea
ker: Professor Stefano Bianchini\, SISSA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160331T153500
DTEND;TZID=America/New_York:20160331T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30206
SUMMARY:Department of Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: TBA\nSpea
ker: Alexander Kiselev\, Rice University
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160407T153500
DTEND;TZID=America/New_York:20160407T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30207
SUMMARY:Department of Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: TBA\nSpea
ker: Professor Shmuel Weinberger\, University of Chicago
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160414T153500
DTEND;TZID=America/New_York:20160414T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30208
SUMMARY:Department of Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: TBA\nAbst
ract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160421T153500
DTEND;TZID=America/New_York:20160421T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30209
SUMMARY:Department of Mathematics Colloquium - Faculty Meeting
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: Faculty M
eeting\nSpeaker: Faculty Meeting
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160428T153500
DTEND;TZID=America/New_York:20160428T163500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=30210
SUMMARY:Department of Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Department of Mathematics Colloquium\nTitle: TBA\nSpea
ker: Professor John Friedlander\, University of Toronto
END:VEVENT
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