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X-WR-CALNAME:Noncommutative Geometry 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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TZOFFSETFROM:-0400
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DTSTART:19701101T020000
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140130T143000
DTEND;TZID=America/New_York:20140130T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20075
SUMMARY:Noncommutative Geometry Seminar - K-theory and Fredholm operators\,
I
DESCRIPTION:Seminar: Noncommutative Geometry Seminar\nTitle: K-theory and F
redholm operators\, I\nSpeaker: Nigel Higson\, Penn State\nAbstract: The i
ndex of a continuous family of Fredholm operators may be constructed as an
element in the topological K-theory of the parameter space. I'll review
the construction\, which goes back to the early days of index theory\, and
then discuss noncommutative generalizations involving Banach algebras and
Frechet algebras\, following the work of Kasparov and Lafforgue. Finally
I'll discuss a relationship between topological K-theory and pairs of adj
oint functors between categories of modules.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140213T143000
DTEND;TZID=America/New_York:20140213T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20081
SUMMARY:Noncommutative Geometry Seminar - Braided noncommutative join const
ruction
DESCRIPTION:Seminar: Noncommutative Geometry Seminar\nTitle: Braided noncom
mutative join construction\nSpeaker: Piotr Hajac\, Polish Academy of Scien
ces\nAbstract: We construct the join of noncommutative Galois objects (qua
ntum torsors) over a Hopf algebra H. To ensure that the join algebra enjoy
s the natural (diagonal) coaction of H\, we braid the tensor product of th
e Galois objects. Then we show that this coaction is principal. Our examp
les are built from the noncommutative torus with the natural free action o
f the classical torus\, and a certain finite-dimensional non-cosemisimple
Hopf algebra thought of as a Galois object over itself. The former yields
a noncommutative deformation of a non-trivial torus bundle\, and the latte
r a finite quantum covering. (Joint work with L. Dabrowski\, T. Hadfield a
nd E. Wagner.)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140403T143000
DTEND;TZID=America/New_York:20140403T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20102
SUMMARY:Noncommutative Geometry Seminar - Three-dimensional gravity\, state
sum models\, and black hole entropy
DESCRIPTION:Seminar: Noncommutative Geometry Seminar\nTitle: Three-dimensio
nal gravity\, state sum models\, and black hole entropy\nSpeaker: Marc Gei
ller\, Penn State\, Department of Physics\nAbstract: After recalling some
properties and features of three-dimensional gravity\, I will explain how
its quantization can be achieved through the use of state sum models and t
he computation of topological invariants. Then\, I will present an applica
tion to the computation of black hole entropy\, and explain the relationsh
ip with recent developments in four-dimensional quantum gravity.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140410T143000
DTEND;TZID=America/New_York:20140410T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20105
SUMMARY:Noncommutative Geometry Seminar - Regularity properties for nuclear
C*-algebras
DESCRIPTION:Seminar: Noncommutative Geometry Seminar\nTitle: Regularity pro
perties for nuclear C*-algebras\nSpeaker: Stuart White\, University of Gla
sgow\nAbstract: In the past few years a number of properties of nuclear C*
-algebras have been identified which are all seen to be satisfied by those
algebras which have been classified by the Elliott programme\,\nand fail
drastically for the exotic counter examples to classification produced in
the 2000's. These `regularity' properties have various different flavours:
topological\, functional analytic\, algebraic\, and\nall correspond natur
ally to features of injective von Neumann algebras used by Connes in his w
ork on injectivity and hyperfiniteness. In this talk\, I'll discuss these
properties and the connections between them\, focusing on obtaining finit
e non-commutative covering dimension\nfrom tensorial stability. All neces
sary terminology will be introduced in the talk.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140417T143000
DTEND;TZID=America/New_York:20140417T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20108
SUMMARY:Noncommutative Geometry Seminar - Is C_0(X) tensor O_2 AF-embeddabl
e?
DESCRIPTION:Seminar: Noncommutative Geometry Seminar\nTitle: Is C_0(X) tens
or O_2 AF-embeddable?\nSpeaker: Bhishan Jacelon\, Purdue University\nAbstr
act: We discuss this question for locally compact\, Hausdorff spaces X tha
t are connected but not locally connected (in particular\, when X is a pro
torus). The primary motivation is to extend the result of Ozawa (the case
X=(0\,1])\, in order to perhaps shed some light on the question of AF-embe
ddability of nuclear\, quasidiagonal C*-algebras. This is work in progress
with Marius Dadarlat.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140424T143000
DTEND;TZID=America/New_York:20140424T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20111
SUMMARY:Noncommutative Geometry Seminar - The generator problem for C*-alge
bras
DESCRIPTION:Seminar: Noncommutative Geometry Seminar\nTitle: The generator
problem for C*-algebras\nSpeaker: Hannes Thiel\, University of Copenhagen
\nAbstract: The generator problem asks to determine for a given C*-algebra
the minimal number of generators\, i.e.\, elements that are not contained
in a proper C*-subalgebra. It is conjectured that every separable\, simpl
e C*-algebra is generated by a single element. The generator problem was o
riginally asked for von Neumann algebras\, and Kadison included it as numb
er 14 of his famous list of 20 “Problems on von Neumann algebras”. The
general problem is still open\, most notably for the free group factors.
\n\nWith Wilhelm Winter\, we proved that every a unital\, separable C*-alg
ebra is generated by a single element if it tensorially absorbs the Jiang-
Su algebra. This generalized most previous results about the generator pro
blem for C*-algebra.\n\nIn a different approach to the generator problem\,
we define a notion of `generator rank'\, in analogy to the real rank. Ins
tead of asking if a certain C*-algebra A is generated by k elements\, the
generator rank records whether the generating k-tuples of A are dense. It
turns out that this invariant has good permanence properties\, for instanc
e it passes to inductive limits. It follows that every AF-algebra is singl
y generated\, and even more the set of generators is generic (a dense G_de
lta-set).
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140501T143000
DTEND;TZID=America/New_York:20140501T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20114
SUMMARY:Noncommutative Geometry Seminar - TBA
DESCRIPTION:Seminar: Noncommutative Geometry Seminar\nTitle: TBA\nAbstract
Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140508T143000
DTEND;TZID=America/New_York:20140508T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20138
SUMMARY:Noncommutative Geometry Seminar - TBA
DESCRIPTION:Seminar: Noncommutative Geometry Seminar\nTitle: TBA\nAbstract
Link: http://
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