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X-WR-CALNAME:GAP Seminar
X-WR-TIMEZONE:America/New_York
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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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TZOFFSETTO:-0500
TZNAME:EST
DTSTART:19701101T020000
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140114T143000
DTEND;TZID=America/New_York:20140114T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20067
SUMMARY:GAP Seminar - Symmetries and quantization in symplectic microgeomet
ry
DESCRIPTION:Seminar: GAP Seminar\nTitle: Symmetries and quantization in sym
plectic microgeometry\nSpeaker: Benoit Dherin\, UC Berkeley\nAbstract: The
main objects in symplectic microgeometry are (certain germs of) lagrangia
n relations between (certain germs of) symplectic spaces. Many geometric d
ata (such as Poisson structures and Poisson maps) can be understood in ter
ms of algebraic identities between these lagrangian relations. \nIn this t
alk\, we will explain how the classical notion of symmetry can be expresse
d and extended using microgeometry and how to obtain a quantum version of
these symmetries using Fourier integral operators associated with the lag
rangian relations.\nThis talk should be accessible to a large audience and
touches upon works in progress with Alberto Cattaneo\, Alan Weinstein\, I
gor Mencattini\, and Friedrich Wagemann.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140121T143000
DTEND;TZID=America/New_York:20140121T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20070
SUMMARY:GAP Seminar - Derived geometry and field theory: an introduction
DESCRIPTION:Seminar: GAP Seminar\nTitle: Derived geometry and field theory:
an introduction\nSpeaker: Giuseppe Bonavolonta\, University of Luxembourg
\nAbstract: The solution functor for a non-linear PDE is a Set valued func
tor over the category of D-algebras (D is the ring of differential operato
rs). In order to allow for more general spaces we consider functors with v
alue in the category SSet of simplicial sets\, as well as SSet-valued fun
ctors defined over the category of differential graded D algebras. We desc
ribe some results (ongoing research) about applications to field theory.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140128T143000
DTEND;TZID=America/New_York:20140128T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20073
SUMMARY:GAP Seminar - EXPANDERS AND K-THEORY FOR GROUP C* ALGEBRAS
DESCRIPTION:Seminar: GAP Seminar\nTitle: EXPANDERS AND K-THEORY FOR GROUP C
* ALGEBRAS\nSpeaker: Paul Baum\, Penn State\nAbstract: An expander or expa
nder family is a sequence of finite graphs X_1\, X_2\, X_3\, ... which
is efficiently connected.\nA discrete group G which``contains" an expander
in its Cayley graph is a counter-example to the Baum-Connes (BC) conjectu
re\nwith coefficients. Some care must be taken with the definition of ``co
ntains". M. Gromov outlined a method for constructing such\na group. G. Ar
jantseva and T. Delzant completed the construction. The group so obtained
is known as the Gromov group and\nis the only known example of a non-exact
group.\nThe left side of BC with coefficients ``sees" any group as if th
e group were exact. This talk will indicate how to make a change\nin the r
ight side of BC with coefficients so that the right side also ``sees" any
group as if the group were exact. This corrected\nform of BC with coeffici
ents uses the unique minimal exact and Morita compatible intermediate cros
sed-product.\nFor exact groups (i.e. all groups except the Gromov group) t
here is no change in BC with coefficients.\nIn the corrected form of BC wi
th coefficients\, the Gromov group acting on the coefficient algebra obtai
ned from the expander is not a counter-example.\nThus at the present time
(January \, 2014) there is no known counter-example to the corrected form
of BC with coefficients.\nThe above is joint work E. Guentner and R. Will
ett. This work is based on --- and inspired by --- a result of R. Willett
and G. Yu.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140204T143000
DTEND;TZID=America/New_York:20140204T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20076
SUMMARY:GAP Seminar - Quantum field theory on curved Lorentzian space time
s
DESCRIPTION:Seminar: GAP Seminar\nTitle: Quantum field theory on curved Lo
rentzian space times\nSpeaker: Nguyen Viet Dang\, Universite Paris 7 and P
enn State\nAbstract: I will give an introduction to quantum field theory
on curved space time\,\nemphasizing the central notion of causality. Then
I will explain the analytical\nproblems encountered when one tries to defi
ne the quantities of interest in\nQFT\, namely the n point functions\, an
d how renormalization solves these\nanalytical issues. This is ongoing pro
ject with Christian Brouder from Paris\n6.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140211T143000
DTEND;TZID=America/New_York:20140211T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20079
SUMMARY:GAP Seminar - A Differential Graded Approach to Derived Manifolds
DESCRIPTION:Seminar: GAP Seminar\nTitle: A Differential Graded Approach to
Derived Manifolds\nSpeaker: David Carchedi\, Max Planck Bonn and Berkeley
\nAbstract: Given two smooth maps of manifolds $f:M \\to L$ and $g:N \\to
L\,$ if they are not transverse\, the fibered product $M \\times_L N$ may
not exist\, or may not have the expected dimension. In the world of derive
d manifolds\, such a fibered product always exists as a smooth object\, re
gardless of transversality. In fact\, every (quasi-smooth) derived manifol
d is locally of this form. In this talk\, we briefly explain what derived
manifolds ought to be\, why one should care about them\, and how one can d
escribe them. We end by explaining a bit of our joint work with Dmitry Roy
tenberg in which we make rigorous some ideas of Kontsevich to give a simpl
e model for derived intersections as certain differential graded manifolds
. Time permitting\, we will compute some examples.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140225T143000
DTEND;TZID=America/New_York:20140225T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20085
SUMMARY:GAP Seminar - Exponential map and L-infinity algebra associated to
a Lie pair
DESCRIPTION:Seminar: GAP Seminar\nTitle: Exponential map and L-infinity alg
ebra associated to a Lie pair\nSpeaker: Mathieu Stienon\, Penn State\nAbst
ract: In this talk\, we unveil homotopy-rich algebraic structures generate
d by the Atiyah classes relative to a Lie pair $(L\,A)$ of algebroids. In
particular\, we prove that the quotient $L/A$ of such a pair admits an ess
entially canonical homotopy module structure over the Lie algebroid $A$\,
which we call Kapranov module.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140318T143000
DTEND;TZID=America/New_York:20140318T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20094
SUMMARY:GAP Seminar - Boundedness of Fano varieties
DESCRIPTION:Seminar: GAP Seminar\nTitle: Boundedness of Fano varieties\nSpe
aker: Ching-Jui Lai\, Purdue University\nAbstract: Fano varieties are impo
rtant objects to study from the minimal\nmodel program point of view since
they are building blocks of Mori fiber\nspaces. We show that there is an
effective upper bound of the volume\,\nVol(-K_X)=−\;KX^3\, for the se
t of mildly singular Fano varieties. This\nresult is related to the Boriso
v-Alexeev-Borisov conjecture which asserts\nboundedness of the set of n-di
mensional ϵ\;-klt log Q-Fano varieties.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140401T143000
DTEND;TZID=America/New_York:20140401T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20100
SUMMARY:GAP Seminar - Variation of stability and derived categories
DESCRIPTION:Seminar: GAP Seminar\nTitle: Variation of stability and derived
categories\nSpeaker: Matt Ballard\, University of South Carolina\nAbstrac
t: There is a long and fruitful interplay between moduli spaces and derive
d categories of coherent sheaves dating back to Mukai. In this talk I will
discuss how Geometric Invariant Theory can mediate this interaction even
in situations not necessarily coming from VGIT. The talk in based on join
t works with A. Bayer\, D. Favero\, and L. Katzarkov.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140408T143000
DTEND;TZID=America/New_York:20140408T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20103
SUMMARY:GAP Seminar - Topological contact dynamics and two applications
DESCRIPTION:Seminar: GAP Seminar\nTitle: Topological contact dynamics and t
wo applications\nSpeaker: Peter Spaeth\, Penn State Altoona\nAbstract: The
smooth dynamics of a contact structure admits a non-trivial extension to
topological dynamics. We will discuss a key result in the subject\, namely
the 1-1 correspondence between topological contact isotopies (and their c
onformal factors) and their generating topological contact Hamiltonians\,
and two applications: topological rigidity of the geodesic flow on riemann
ian manifolds and the extension of the helicity invariant to topological d
ynamics.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140415T143000
DTEND;TZID=America/New_York:20140415T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20106
SUMMARY:GAP Seminar - Odd dimensional generalized geometry
DESCRIPTION:Seminar: GAP Seminar\nTitle: Odd dimensional generalized geomet
ry\nSpeaker: Marco Aldi\, Virginia Commonwealth University\nAbstract: Gene
ralized geometry is the study of the geometry of the generalized tangent b
undle (direct sum of the tangent and cotangent bundle) of a manifold. Part
ly because of the connection with supersymmetric sigma-models\, most of th
e literature on generalized geometry specializes to even-dimensional manif
olds. The odd-dimensional case\, pioneered by Wade and Poon\, is much less
understood. In this talk we report on some recent progress (joint work wi
th Daniele Grandini) on odd-dimensional generalized geometry including a s
pinorial formulation and T-duality.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140422T143000
DTEND;TZID=America/New_York:20140422T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20109
SUMMARY:GAP Seminar - Constructions in shifted symplectic geometry
DESCRIPTION:Seminar: GAP Seminar\nTitle: Constructions in shifted symplecti
c geometry\nSpeaker: Tony Pantev\, University of Pennsylvania\nAbstract: I
will introduce a version of algebraic symplectic geometry\nthat is suitab
le for dealing with singular or stacky spaces. I will\nexplain how this ge
neralization arises naturally in the study of\nmoduli spaces and will outl
ine the connections to ordinary symplectic\ngeometry. I will also give int
eresting examples and will describe a\nseveral non-trivial constructions o
f shifted symplectic structures.\nThis is a joint work with Toen\, Vaquie
\, and Vezzosi.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140429T143000
DTEND;TZID=America/New_York:20140429T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20112
SUMMARY:GAP Seminar - TBA
DESCRIPTION:Seminar: GAP Seminar\nTitle: TBA\nSpeaker: Camille Laurent-Geng
ux\, Universite de Lorraine
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140506T143000
DTEND;TZID=America/New_York:20140506T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20116
SUMMARY:GAP Seminar - TBA
DESCRIPTION:Seminar: GAP Seminar\nTitle: TBA\nAbstract Link: http://
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